656428 has 12 divisors (see below), whose sum is σ = 1154440. Its totient is φ = 326592.

The previous prime is 656423. The next prime is 656429. The reversal of 656428 is 824656.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 656428.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 656428.

It is not an unprimeable number, because it can be changed into a prime (656423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1300 + ... + 1732.

2⁶⁵⁶⁴²⁸ is an apocalyptic number.

It is an amenable number.

656428 is a deficient number, since it is larger than the sum of its proper divisors (498012).

656428 is a wasteful number, since it uses less digits than its factorization.

656428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816 (or 814 counting only the distinct ones).

The product of its digits is 11520, while the sum is 31.

The square root of 656428 is about 810.2024438373. The cubic root of 656428 is about 86.9085223356.

The spelling of 656428 in words is "six hundred fifty-six thousand, four hundred twenty-eight".