30640716 has 18 divisors (see below), whose sum is σ = 77453012. Its totient is φ = 10213560.

The previous prime is 30640697. The next prime is 30640717. The reversal of 30640716 is 61704603.

30640716 is a `hidden beast` number, since 3 + 0 + 640 + 7 + 16 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 30640716.

It is not an unprimeable number, because it can be changed into a prime (30640717) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 425530 + ... + 425601.

Almost surely, 2^30640716 is an apocalyptic number.

30640716 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

30640716 is an abundant number, since it is smaller than the sum of its proper divisors (46812296).

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

30640716 is a wasteful number, since it uses less digits than its factorization.

30640716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851141 (or 851136 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 30640716 is about 5535.4056761903. The cubic root of 30640716 is about 312.9197465619.

The spelling of 30640716 in words is "thirty million, six hundred forty thousand, seven hundred sixteen".