31968330 has 32 divisors (see below), whose sum is σ = 81238464. Its totient is φ = 8023296.

The previous prime is 31968301. The next prime is 31968359. The reversal of 31968330 is 3386913.

It is an interprime number because it is at equal distance from previous prime (31968301) and next prime (31968359).

It is a junction number, because it is equal to n+sod(n) for n = 31968291 and 31968300.

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, 30832 + ... + 31851.

It is an arithmetic number, because the mean of its divisors is an integer number (2538702).

Almost surely, 2^31968330 is an apocalyptic number.

31968330 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31968330 is an abundant number, since it is smaller than the sum of its proper divisors (49270134).

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

31968330 is a wasteful number, since it uses less digits than its factorization.

31968330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62710.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 31968330 is about 5654.0542975815. The cubic root of 31968330 is about 317.3754404243.

The spelling of 31968330 in words is "thirty-one million, nine hundred sixty-eight thousand, three hundred thirty".