31996970 has 16 divisors (see below), whose sum is σ = 57811968. Its totient is φ = 12750480.

The previous prime is 31996961. The next prime is 31996973. The reversal of 31996970 is 7969913.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (31996973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3194 + ... + 8613.

It is an arithmetic number, because the mean of its divisors is an integer number (3613248).

Almost surely, 2^31996970 is an apocalyptic number.

31996970 is a deficient number, since it is larger than the sum of its proper divisors (25814998).

31996970 is a wasteful number, since it uses less digits than its factorization.

31996970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12085.

The product of its (nonzero) digits is 91854, while the sum is 44.

The square root of 31996970 is about 5656.5864264590. The cubic root of 31996970 is about 317.4701896082.

The spelling of 31996970 in words is "thirty-one million, nine hundred ninety-six thousand, nine hundred seventy".