28100656 has 20 divisors (see below), whose sum is σ = 54565704. Its totient is φ = 14019200.

The previous prime is 28100651. The next prime is 28100659. The reversal of 28100656 is 65600182.

It is not an unprimeable number, because it can be changed into a prime (28100651) 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, 6651 + ... + 10021.

Almost surely, 2^28100656 is an apocalyptic number.

It is an amenable number.

28100656 is a deficient number, since it is larger than the sum of its proper divisors (26465048).

28100656 is a wasteful number, since it uses less digits than its factorization.

28100656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3900 (or 3894 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 28100656 is about 5301.0051876979. The cubic root of 28100656 is about 304.0223321544.

The spelling of 28100656 in words is "twenty-eight million, one hundred thousand, six hundred fifty-six".