28700656 has 40 divisors (see below), whose sum is σ = 57902544. Its totient is φ = 13770240.

The previous prime is 28700647. The next prime is 28700657. The reversal of 28700656 is 65600782.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28700657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43626 + ... + 44278.

Almost surely, 2^28700656 is an apocalyptic number.

It is an amenable number.

28700656 is an abundant number, since it is smaller than the sum of its proper divisors (29201888).

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

28700656 is a wasteful number, since it uses less digits than its factorization.

28700656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769 (or 763 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 28700656 is about 5357.2993196199. The cubic root of 28700656 is about 306.1709213566.

The spelling of 28700656 in words is "twenty-eight million, seven hundred thousand, six hundred fifty-six".