31996180 has 12 divisors (see below), whose sum is σ = 67192020. Its totient is φ = 12798464.

The previous prime is 31996169. The next prime is 31996207. The reversal of 31996180 is 8169913.

It can be written as a sum of positive squares in 2 ways, for example, as 12759184 + 19236996 = 3572^2 + 4386^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 799885 + ... + 799924.

It is an arithmetic number, because the mean of its divisors is an integer number (5599335).

Almost surely, 2^31996180 is an apocalyptic number.

It is an amenable number.

31996180 is an abundant number, since it is smaller than the sum of its proper divisors (35195840).

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

31996180 is a wasteful number, since it uses less digits than its factorization.

31996180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1599818 (or 1599816 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 31996180 is about 5656.5165959272. The cubic root of 31996180 is about 317.4675768242.

The spelling of 31996180 in words is "thirty-one million, nine hundred ninety-six thousand, one hundred eighty".