31618948 has 12 divisors (see below), whose sum is σ = 55480320. Its totient is φ = 15767432.

The previous prime is 31618943. The next prime is 31618949. The reversal of 31618948 is 84981613.

It is a self number, because there is not a number n which added to its sum of digits gives 31618948.

It is not an unprimeable number, because it can be changed into a prime (31618943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8788 + ... + 11851.

It is an arithmetic number, because the mean of its divisors is an integer number (4623360).

Almost surely, 2^31618948 is an apocalyptic number.

It is an amenable number.

31618948 is a deficient number, since it is larger than the sum of its proper divisors (23861372).

31618948 is a wasteful number, since it uses less digits than its factorization.

31618948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21026 (or 21024 counting only the distinct ones).

The product of its digits is 41472, while the sum is 40.

The square root of 31618948 is about 5623.0728254221. The cubic root of 31618948 is about 316.2150034962.

The spelling of 31618948 in words is "thirty-one million, six hundred eighteen thousand, nine hundred forty-eight".