157905920 has 44 divisors (see below), whose sum is σ = 378801444. Its totient is φ = 63160320.

The previous prime is 157905919. The next prime is 157905931. The reversal of 157905920 is 29509751.

It can be written as a sum of positive squares in 2 ways, for example, as 93392896 + 64513024 = 9664^2 + 8032^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10301 + ... + 20540.

Almost surely, 2^157905920 is an apocalyptic number.

157905920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157905920 is an abundant number, since it is smaller than the sum of its proper divisors (220895524).

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

157905920 is an equidigital number, since it uses as much as digits as its factorization.

157905920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30866 (or 30848 counting only the distinct ones).

The product of its (nonzero) digits is 28350, while the sum is 38.

The square root of 157905920 is about 12566.0622312640. The cubic root of 157905920 is about 540.5046950500.

The spelling of 157905920 in words is "one hundred fifty-seven million, nine hundred five thousand, nine hundred twenty".