31968756 has 30 divisors (see below), whose sum is σ = 83573490. Its totient is φ = 10656144.

The previous prime is 31968751. The next prime is 31968779. The reversal of 31968756 is 65786913.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18352656 + 13616100 = 4284^2 + 3690^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31968751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 49011 + ... + 49658.

It is an arithmetic number, because the mean of its divisors is an integer number (2785783).

Almost surely, 2^31968756 is an apocalyptic number.

31968756 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

31968756 is an abundant number, since it is smaller than the sum of its proper divisors (51604734).

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

31968756 is a wasteful number, since it uses less digits than its factorization.

31968756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98685 (or 98674 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 31968756 is about 5654.0919695385. The cubic root of 31968756 is about 317.3768501667.

The spelling of 31968756 in words is "thirty-one million, nine hundred sixty-eight thousand, seven hundred fifty-six".