31662642 has 32 divisors (see below), whose sum is σ = 69284160. Its totient is φ = 9566720.

The previous prime is 31662637. The next prime is 31662667. The reversal of 31662642 is 24626613.

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 15 ways as a sum of consecutive naturals, for example, 38734 + ... + 39542.

It is an arithmetic number, because the mean of its divisors is an integer number (2165130).

Almost surely, 2^31662642 is an apocalyptic number.

31662642 is an abundant number, since it is smaller than the sum of its proper divisors (37621518).

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

31662642 is a wasteful number, since it uses less digits than its factorization.

31662642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1418.

The product of its digits is 10368, while the sum is 30.

The square root of 31662642 is about 5626.9567263309. The cubic root of 31662642 is about 316.3605948764.

The spelling of 31662642 in words is "thirty-one million, six hundred sixty-two thousand, six hundred forty-two".