30904992 has 36 divisors (see below), whose sum is σ = 87886890. Its totient is φ = 10301568.

The previous prime is 30904969. The next prime is 30904999. The reversal of 30904992 is 29940903.

It can be written as a sum of positive squares in only one way, i.e., 29550096 + 1354896 = 5436^2 + 1164^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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

It is not an unprimeable number, because it can be changed into a prime (30904999) 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, 53367 + ... + 53942.

Almost surely, 2^30904992 is an apocalyptic number.

30904992 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

30904992 is an abundant number, since it is smaller than the sum of its proper divisors (56981898).

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

30904992 is a wasteful number, since it uses less digits than its factorization.

30904992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107325 (or 107314 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 30904992 is about 5559.2258453853. The cubic root of 30904992 is about 313.8168160847.

The spelling of 30904992 in words is "thirty million, nine hundred four thousand, nine hundred ninety-two".