30640912 has 10 divisors (see below), whose sum is σ = 59366798. Its totient is φ = 15320448.

The previous prime is 30640891. The next prime is 30640913. The reversal of 30640912 is 21904603.

It can be written as a sum of positive squares in only one way, i.e., 18696976 + 11943936 = 4324^2 + 3456^2 .

It is not an unprimeable number, because it can be changed into a prime (30640913) 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 as a sum of consecutive naturals, namely, 957513 + ... + 957544.

Almost surely, 2^30640912 is an apocalyptic number.

It is an amenable number.

30640912 is a deficient number, since it is larger than the sum of its proper divisors (28725886).

30640912 is a wasteful number, since it uses less digits than its factorization.

30640912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1915065 (or 1915059 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 30640912 is about 5535.4233803748. The cubic root of 30640912 is about 312.9204137802.

The spelling of 30640912 in words is "thirty million, six hundred forty thousand, nine hundred twelve".