30320856 has 24 divisors (see below), whose sum is σ = 82119180. Its totient is φ = 10106928.

The previous prime is 30320839. The next prime is 30320881. The reversal of 30320856 is 65802303.

It is a tau number, because it is divible by the number of its divisors (24).

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 5 ways as a sum of consecutive naturals, for example, 210490 + ... + 210633.

Almost surely, 2^30320856 is an apocalyptic number.

30320856 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

30320856 is an abundant number, since it is smaller than the sum of its proper divisors (51798324).

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

30320856 is a wasteful number, since it uses less digits than its factorization.

30320856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421135 (or 421128 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 30320856 is about 5506.4376869261. The cubic root of 30320856 is about 311.8270737985.

The spelling of 30320856 in words is "thirty million, three hundred twenty thousand, eight hundred fifty-six".