30640402948 has 24 divisors (see below), whose sum is σ = 56861891352. Its totient is φ = 14396911104.

The previous prime is 30640402943. The next prime is 30640402979. The reversal of 30640402948 is 84920404603.

It can be written as a sum of positive squares in 4 ways, for example, as 8308687104 + 22331715844 = 91152^2 + 149438^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 30640402948.

It is not an unprimeable number, because it can be changed into a prime (30640402943) 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, 300615 + ... + 389422.

It is an arithmetic number, because the mean of its divisors is an integer number (2369245473).

Almost surely, 2^30640402948 is an apocalyptic number.

It is an amenable number.

30640402948 is a deficient number, since it is larger than the sum of its proper divisors (26221488404).

30640402948 is a wasteful number, since it uses less digits than its factorization.

30640402948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690711 (or 690709 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 40.

The spelling of 30640402948 in words is "thirty billion, six hundred forty million, four hundred two thousand, nine hundred forty-eight".