30015697920 has 528 divisors, whose sum is σ = 107597394432. Its totient is φ = 7130972160.

The previous prime is 30015697903. The next prime is 30015697931. The reversal of 30015697920 is 2979651003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 80470854 + ... + 80471226.

It is an arithmetic number, because the mean of its divisors is an integer number (203782944).

Almost surely, 2^30015697920 is an apocalyptic number.

30015697920 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30015697920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53798697216).

30015697920 is an abundant number, since it is smaller than the sum of its proper divisors (77581696512).

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

30015697920 is a wasteful number, since it uses less digits than its factorization.

30015697920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458 (or 427 counting only the distinct ones).

The product of its (nonzero) digits is 102060, while the sum is 42.

The spelling of 30015697920 in words is "thirty billion, fifteen million, six hundred ninety-seven thousand, nine hundred twenty".