30856680 has 64 divisors (see below), whose sum is σ = 102859200. Its totient is φ = 8228160.

The previous prime is 30856673. The next prime is 30856691. The reversal of 30856680 is 8665803.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13206 + ... + 15365.

It is an arithmetic number, because the mean of its divisors is an integer number (1607175).

Almost surely, 2^30856680 is an apocalyptic number.

30856680 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30856680 is an abundant number, since it is smaller than the sum of its proper divisors (72002520).

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

30856680 is a wasteful number, since it uses less digits than its factorization.

30856680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28591 (or 28581 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 30856680 is about 5554.8789365746. The cubic root of 30856680 is about 313.6532068631.

The spelling of 30856680 in words is "thirty million, eight hundred fifty-six thousand, six hundred eighty".