156684428 has 12 divisors (see below), whose sum is σ = 275730840. Its totient is φ = 77904192.

The previous prime is 156684403. The next prime is 156684439. The reversal of 156684428 is 824486651.

It is a happy number.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

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, 108701 + ... + 110132.

It is an arithmetic number, because the mean of its divisors is an integer number (22977570).

Almost surely, 2^156684428 is an apocalyptic number.

It is an amenable number.

156684428 is a deficient number, since it is larger than the sum of its proper divisors (119046412).

156684428 is a wasteful number, since it uses less digits than its factorization.

156684428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219016 (or 219014 counting only the distinct ones).

The product of its digits is 368640, while the sum is 44.

The square root of 156684428 is about 12517.3650581902. The cubic root of 156684428 is about 539.1073822010.

The spelling of 156684428 in words is "one hundred fifty-six million, six hundred eighty-four thousand, four hundred twenty-eight".