30915679402 has 12 divisors (see below), whose sum is σ = 48477423330. Its totient is φ = 14785759208.

The previous prime is 30915679397. The next prime is 30915679429. The reversal of 30915679402 is 20497651903.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 29859494401 + 1056185001 = 172799^2 + 32499^2 .

It is a Harshad number since it is a multiple of its sum of digits (46).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14609377 + ... + 14611492.

Almost surely, 2^30915679402 is an apocalyptic number.

30915679402 is a deficient number, since it is larger than the sum of its proper divisors (17561743928).

30915679402 is a wasteful number, since it uses less digits than its factorization.

30915679402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29220917 (or 29220894 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 46.

The spelling of 30915679402 in words is "thirty billion, nine hundred fifteen million, six hundred seventy-nine thousand, four hundred two".