31230930 has 32 divisors (see below), whose sum is σ = 76785408. Its totient is φ = 8124800.

The previous prime is 31230929. The next prime is 31230959. The reversal of 31230930 is 3903213.

It is a junction number, because it is equal to n+sod(n) for n = 31230897 and 31230906.

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, 11466 + ... + 13925.

It is an arithmetic number, because the mean of its divisors is an integer number (2399544).

Almost surely, 2^31230930 is an apocalyptic number.

31230930 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31230930 is an abundant number, since it is smaller than the sum of its proper divisors (45554478).

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

31230930 is a wasteful number, since it uses less digits than its factorization.

31230930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25442.

The product of its (nonzero) digits is 486, while the sum is 21.

The square root of 31230930 is about 5588.4640107994. The cubic root of 31230930 is about 314.9161782512.

The spelling of 31230930 in words is "thirty-one million, two hundred thirty thousand, nine hundred thirty".