31448664 has 48 divisors (see below), whose sum is σ = 91728000. Its totient is φ = 9676224.

The previous prime is 31448647. The next prime is 31448693. The reversal of 31448664 is 46684413.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15864 + ... + 17735.

It is an arithmetic number, because the mean of its divisors is an integer number (1911000).

Almost surely, 2^31448664 is an apocalyptic number.

It is an amenable number.

31448664 is an abundant number, since it is smaller than the sum of its proper divisors (60279336).

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

31448664 is a wasteful number, since it uses less digits than its factorization.

31448664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33624 (or 33617 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 31448664 is about 5607.9108409460. The cubic root of 31448664 is about 315.6463222402.

The spelling of 31448664 in words is "thirty-one million, four hundred forty-eight thousand, six hundred sixty-four".