30979716 has 12 divisors (see below), whose sum is σ = 72286032. Its totient is φ = 10326568.

The previous prime is 30979703. The next prime is 30979717. The reversal of 30979716 is 61797903.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (30979717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1290810 + ... + 1290833.

It is an arithmetic number, because the mean of its divisors is an integer number (6023836).

Almost surely, 2^30979716 is an apocalyptic number.

It is an amenable number.

30979716 is an abundant number, since it is smaller than the sum of its proper divisors (41306316).

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

30979716 is a wasteful number, since it uses less digits than its factorization.

30979716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2581650 (or 2581648 counting only the distinct ones).

The product of its (nonzero) digits is 71442, while the sum is 42.

The square root of 30979716 is about 5565.9425077879. The cubic root of 30979716 is about 314.0695344134.

The spelling of 30979716 in words is "thirty million, nine hundred seventy-nine thousand, seven hundred sixteen".