157985972 has 12 divisors (see below), whose sum is σ = 276711876. Its totient is φ = 78925440.

The previous prime is 157985963. The next prime is 157985983. The reversal of 157985972 is 279589751.

It is a happy number.

157985972 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 56460196 + 101525776 = 7514^2 + 10076^2 .

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, 11429 + ... + 21132.

It is an arithmetic number, because the mean of its divisors is an integer number (23059323).

Almost surely, 2^157985972 is an apocalyptic number.

It is an amenable number.

157985972 is a deficient number, since it is larger than the sum of its proper divisors (118725904).

157985972 is a wasteful number, since it uses less digits than its factorization.

157985972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33778 (or 33776 counting only the distinct ones).

The product of its digits is 1587600, while the sum is 53.

The square root of 157985972 is about 12569.2470737113. The cubic root of 157985972 is about 540.5960177231.

The spelling of 157985972 in words is "one hundred fifty-seven million, nine hundred eighty-five thousand, nine hundred seventy-two".