30564940 has 48 divisors (see below), whose sum is σ = 73749312. Its totient is φ = 10423296.

The previous prime is 30564893. The next prime is 30564943. The reversal of 30564940 is 4946503.

It is not an unprimeable number, because it can be changed into a prime (30564943) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 32152 + ... + 33088.

It is an arithmetic number, because the mean of its divisors is an integer number (1536444).

Almost surely, 2^30564940 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30564940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36874656).

30564940 is an abundant number, since it is smaller than the sum of its proper divisors (43184372).

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

30564940 is a wasteful number, since it uses less digits than its factorization.

30564940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1186 (or 1184 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 30564940 is about 5528.5567736978. The cubic root of 30564940 is about 312.6615783081.

The spelling of 30564940 in words is "thirty million, five hundred sixty-four thousand, nine hundred forty".