30732990 has 16 divisors (see below), whose sum is σ = 73759248. Its totient is φ = 8195456.

The previous prime is 30732983. The next prime is 30733009. The reversal of 30732990 is 9923703.

It is a congruent 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, 512187 + ... + 512246.

It is an arithmetic number, because the mean of its divisors is an integer number (4609953).

Almost surely, 2^30732990 is an apocalyptic number.

30732990 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

30732990 is an abundant number, since it is smaller than the sum of its proper divisors (43026258).

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

30732990 is a wasteful number, since it uses less digits than its factorization.

30732990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1024443.

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

The square root of 30732990 is about 5543.7343009924. The cubic root of 30732990 is about 313.2335492835.

The spelling of 30732990 in words is "thirty million, seven hundred thirty-two thousand, nine hundred ninety".