30937220 has 12 divisors (see below), whose sum is σ = 64968204. Its totient is φ = 12374880.

The previous prime is 30937219. The next prime is 30937223. The reversal of 30937220 is 2273903.

It can be written as a sum of positive squares in 2 ways, for example, as 15555136 + 15382084 = 3944^2 + 3922^2 .

It is a super-2 number, since 2×30937220² = 1914223162656800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 30937220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30937223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 773411 + ... + 773450.

It is an arithmetic number, because the mean of its divisors is an integer number (5414017).

Almost surely, 2^30937220 is an apocalyptic number.

It is an amenable number.

30937220 is an abundant number, since it is smaller than the sum of its proper divisors (34030984).

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

30937220 is a wasteful number, since it uses less digits than its factorization.

30937220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1546870 (or 1546868 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 26.

The square root of 30937220 is about 5562.1236951366. The cubic root of 30937220 is about 313.9258618427.

The spelling of 30937220 in words is "thirty million, nine hundred thirty-seven thousand, two hundred twenty".