157405904 has 10 divisors (see below), whose sum is σ = 304973970. Its totient is φ = 78702944.

The previous prime is 157405891. The next prime is 157405921. The reversal of 157405904 is 409504751.

It can be written as a sum of positive squares in only one way, i.e., 115777600 + 41628304 = 10760^2 + 6452^2 .

It is a super-2 number, since 2×157405904² = 49553237228114432, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4918919 + ... + 4918950.

It is an arithmetic number, because the mean of its divisors is an integer number (30497397).

Almost surely, 2^157405904 is an apocalyptic number.

It is an amenable number.

157405904 is a deficient number, since it is larger than the sum of its proper divisors (147568066).

157405904 is an equidigital number, since it uses as much as digits as its factorization.

157405904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9837877 (or 9837871 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 157405904 is about 12546.1509635426. The cubic root of 157405904 is about 539.9335812228.

The spelling of 157405904 in words is "one hundred fifty-seven million, four hundred five thousand, nine hundred four".