31968906 has 32 divisors (see below), whose sum is σ = 67698240. Its totient is φ = 10036224.

The previous prime is 31968901. The next prime is 31968907. The reversal of 31968906 is 60986913.

It is not an unprimeable number, because it can be changed into a prime (31968901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21276 + ... + 22728.

It is an arithmetic number, because the mean of its divisors is an integer number (2115570).

Almost surely, 2^31968906 is an apocalyptic number.

31968906 is an abundant number, since it is smaller than the sum of its proper divisors (35729334).

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

31968906 is a wasteful number, since it uses less digits than its factorization.

31968906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1670.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 31968906 is about 5654.1052342524. The cubic root of 31968906 is about 317.3773465520.

The spelling of 31968906 in words is "thirty-one million, nine hundred sixty-eight thousand, nine hundred six".