30964920 has 128 divisors (see below), whose sum is σ = 107274240. Its totient is φ = 7004160.

The previous prime is 30964897. The next prime is 30964931. The reversal of 30964920 is 2946903.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 160344 + ... + 160536.

It is an arithmetic number, because the mean of its divisors is an integer number (838080).

Almost surely, 2^30964920 is an apocalyptic number.

30964920 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30964920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53637120).

30964920 is an abundant number, since it is smaller than the sum of its proper divisors (76309320).

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

30964920 is a wasteful number, since it uses less digits than its factorization.

30964920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405 (or 401 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 30964920 is about 5564.6131941043. The cubic root of 30964920 is about 314.0195262851.

The spelling of 30964920 in words is "thirty million, nine hundred sixty-four thousand, nine hundred twenty".