30801818728 has 32 divisors (see below), whose sum is σ = 58723205760. Its totient is φ = 15142495680.

The previous prime is 30801818717. The next prime is 30801818741. The reversal of 30801818728 is 82781810803.

It is a happy number.

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, 1397925 + ... + 1419787.

It is an arithmetic number, because the mean of its divisors is an integer number (1835100180).

Almost surely, 2^30801818728 is an apocalyptic number.

It is an amenable number.

30801818728 is a deficient number, since it is larger than the sum of its proper divisors (27921387032).

30801818728 is a wasteful number, since it uses less digits than its factorization.

30801818728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24817 (or 24813 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 46.

The spelling of 30801818728 in words is "thirty billion, eight hundred one million, eight hundred eighteen thousand, seven hundred twenty-eight".