30920856 has 32 divisors (see below), whose sum is σ = 77459760. Its totient is φ = 10285952.

The previous prime is 30920843. The next prime is 30920861. The reversal of 30920856 is 65802903.

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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14686 + ... + 16658.

Almost surely, 2^30920856 is an apocalyptic number.

It is an amenable number.

30920856 is an abundant number, since it is smaller than the sum of its proper divisors (46538904).

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

30920856 is a wasteful number, since it uses less digits than its factorization.

30920856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2635 (or 2631 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 30920856 is about 5560.6524797006. The cubic root of 30920856 is about 313.8705025397.

The spelling of 30920856 in words is "thirty million, nine hundred twenty thousand, eight hundred fifty-six".