30939072 has 28 divisors (see below), whose sum is σ = 81860136. Its totient is φ = 10312960.

The previous prime is 30939053. The next prime is 30939101. The reversal of 30939072 is 27093903.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80379 + ... + 80762.

Almost surely, 2^30939072 is an apocalyptic number.

30939072 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

30939072 is an abundant number, since it is smaller than the sum of its proper divisors (50921064).

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

30939072 is a wasteful number, since it uses less digits than its factorization.

30939072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161156 (or 161146 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 33.

The square root of 30939072 is about 5562.2901758179. The cubic root of 30939072 is about 313.9321259166.

The spelling of 30939072 in words is "thirty million, nine hundred thirty-nine thousand, seventy-two".