56891028 has 24 divisors (see below), whose sum is σ = 132874560. Its totient is φ = 18945280.

The previous prime is 56890987. The next prime is 56891041. The reversal of 56891028 is 82019865.

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 7 ways as a sum of consecutive naturals, for example, 17188 + ... + 20228.

It is an arithmetic number, because the mean of its divisors is an integer number (5536440).

Almost surely, 2^56891028 is an apocalyptic number.

It is an amenable number.

56891028 is an abundant number, since it is smaller than the sum of its proper divisors (75983532).

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

56891028 is a wasteful number, since it uses less digits than its factorization.

56891028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4607 (or 4605 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 56891028 is about 7542.6141356959. The cubic root of 56891028 is about 384.6047058738.

The spelling of 56891028 in words is "fifty-six million, eight hundred ninety-one thousand, twenty-eight".