30640931944 has 32 divisors (see below), whose sum is σ = 65664760320. Its totient is φ = 13130703936.

The previous prime is 30640931939. The next prime is 30640931947. The reversal of 30640931944 is 44913904603.

It is a self number, because there is not a number n which added to its sum of digits gives 30640931944.

It is not an unprimeable number, because it can be changed into a prime (30640931947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1236702 + ... + 1261234.

It is an arithmetic number, because the mean of its divisors is an integer number (2052023760).

Almost surely, 2^30640931944 is an apocalyptic number.

It is an amenable number.

30640931944 is an abundant number, since it is smaller than the sum of its proper divisors (35023828376).

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

30640931944 is a wasteful number, since it uses less digits than its factorization.

30640931944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46849 (or 46845 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 43.

The spelling of 30640931944 in words is "thirty billion, six hundred forty million, nine hundred thirty-one thousand, nine hundred forty-four".