31296930 has 32 divisors (see below), whose sum is σ = 85843584. Its totient is φ = 7153536.

The previous prime is 31296919. The next prime is 31296943. The reversal of 31296930 is 3969213.

It is a junction number, because it is equal to n+sod(n) for n = 31296891 and 31296900.

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, 74307 + ... + 74726.

It is an arithmetic number, because the mean of its divisors is an integer number (2682612).

Almost surely, 2^31296930 is an apocalyptic number.

31296930 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31296930 is an abundant number, since it is smaller than the sum of its proper divisors (54546654).

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

31296930 is a wasteful number, since it uses less digits than its factorization.

31296930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149050.

The product of its (nonzero) digits is 8748, while the sum is 33.

The square root of 31296930 is about 5594.3659158121. The cubic root of 31296930 is about 315.1378585292.

The spelling of 31296930 in words is "thirty-one million, two hundred ninety-six thousand, nine hundred thirty".