30681792 has 42 divisors (see below), whose sum is σ = 87945468. Its totient is φ = 10227072.

The previous prime is 30681773. The next prime is 30681809. The reversal of 30681792 is 29718603.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26058 + ... + 27209.

Almost surely, 2^30681792 is an apocalyptic number.

30681792 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

30681792 is an abundant number, since it is smaller than the sum of its proper divisors (57263676).

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

30681792 is a wasteful number, since it uses less digits than its factorization.

30681792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53285 (or 53272 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 30681792 is about 5539.1147307128. The cubic root of 30681792 is about 313.0595143154.

The spelling of 30681792 in words is "thirty million, six hundred eighty-one thousand, seven hundred ninety-two".