157280 has 24 divisors (see below), whose sum is σ = 371952. Its totient is φ = 62848.

The previous prime is 157279. The next prime is 157291. The reversal of 157280 is 82751.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332 + ... + 651.

It is an arithmetic number, because the mean of its divisors is an integer number (15498).

2^{157280} is an apocalyptic number.

157280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157280 is an abundant number, since it is smaller than the sum of its proper divisors (214672).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

157280 is an equidigital number, since it uses as much as digits as its factorization.

157280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998 (or 990 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 157280 is about 396.5854258543. The cubic root of 157280 is about 53.9789584230.

Subtracting from 157280 its reverse (82751), we obtain a square (74529 = 273^{2}).

The spelling of 157280 in words is "one hundred fifty-seven thousand, two hundred eighty".

Divisors: 1 2 4 5 8 10 16 20 32 40 80 160 983 1966 3932 4915 7864 9830 15728 19660 31456 39320 78640 157280

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