30668520 has 32 divisors (see below), whose sum is σ = 92005920. Its totient is φ = 8178240.

The previous prime is 30668509. The next prime is 30668557. The reversal of 30668520 is 2586603.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127666 + ... + 127905.

It is an arithmetic number, because the mean of its divisors is an integer number (2875185).

Almost surely, 2^30668520 is an apocalyptic number.

30668520 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30668520 is an abundant number, since it is smaller than the sum of its proper divisors (61337400).

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

30668520 is a wasteful number, since it uses less digits than its factorization.

30668520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255585 (or 255581 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 30668520 is about 5537.9165757530. The cubic root of 30668520 is about 313.0143678312.

The spelling of 30668520 in words is "thirty million, six hundred sixty-eight thousand, five hundred twenty".