30923220 has 48 divisors (see below), whose sum is σ = 86929920. Its totient is φ = 8213376.

The previous prime is 30923209. The next prime is 30923237. The reversal of 30923220 is 2232903.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16701 + ... + 18459.

It is an arithmetic number, because the mean of its divisors is an integer number (1811040).

Almost surely, 2^30923220 is an apocalyptic number.

30923220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30923220 is an abundant number, since it is smaller than the sum of its proper divisors (56006700).

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

30923220 is a wasteful number, since it uses less digits than its factorization.

30923220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2064 (or 2062 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 30923220 is about 5560.8650406209. The cubic root of 30923220 is about 313.8785011428.

The spelling of 30923220 in words is "thirty million, nine hundred twenty-three thousand, two hundred twenty".