28556996 has 36 divisors (see below), whose sum is σ = 55824132. Its totient is φ = 12706176.

The previous prime is 28556993. The next prime is 28557013. The reversal of 28556996 is 69965582.

It can be written as a sum of positive squares in 6 ways, for example, as 2689600 + 25867396 = 1640^2 + 5086^2 .

It is not an unprimeable number, because it can be changed into a prime (28556993) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43406 + ... + 44058.

Almost surely, 2^28556996 is an apocalyptic number.

28556996 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

28556996 is a deficient number, since it is larger than the sum of its proper divisors (27267136).

28556996 is a wasteful number, since it uses less digits than its factorization.

28556996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728 (or 697 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 50.

The square root of 28556996 is about 5343.8746242778. The cubic root of 28556996 is about 305.6592244939.

The spelling of 28556996 in words is "twenty-eight million, five hundred fifty-six thousand, nine hundred ninety-six".