28396656 has 50 divisors (see below), whose sum is σ = 82191912. Its totient is φ = 9465120.

The previous prime is 28396637. The next prime is 28396661. The reversal of 28396656 is 65669382.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 9660 + ... + 12251.

Almost surely, 2^28396656 is an apocalyptic number.

It is an amenable number.

28396656 is an abundant number, since it is smaller than the sum of its proper divisors (53795256).

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

28396656 is a wasteful number, since it uses less digits than its factorization.

28396656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21931 (or 21916 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 28396656 is about 5328.8512833443. The cubic root of 28396656 is about 305.0860851693.

The spelling of 28396656 in words is "twenty-eight million, three hundred ninety-six thousand, six hundred fifty-six".