156916404 has 18 divisors (see below), whose sum is σ = 396649890. Its totient is φ = 52305456.

The previous prime is 156916391. The next prime is 156916427. The reversal of 156916404 is 404619651.

156916404 is a `hidden beast` number, since 1 + 5 + 6 + 9 + 1 + 640 + 4 = 666.

156916404 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 only one way, i.e., 123876900 + 33039504 = 11130^2 + 5748^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 4358789 = 156916404 / (1 + 5 + 6 + 9 + 1 + 6 + 4 + 0 + 4).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2179359 + ... + 2179430.

It is an arithmetic number, because the mean of its divisors is an integer number (22036105).

Almost surely, 2^156916404 is an apocalyptic number.

It is an amenable number.

156916404 is an abundant number, since it is smaller than the sum of its proper divisors (239733486).

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

156916404 is a wasteful number, since it uses less digits than its factorization.

156916404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4358799 (or 4358794 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 156916404 is about 12526.6277984141. The cubic root of 156916404 is about 539.3733058967.

The spelling of 156916404 in words is "one hundred fifty-six million, nine hundred sixteen thousand, four hundred four".