31493664 has 48 divisors (see below), whose sum is σ = 91859040. Its totient is φ = 10497600.

The previous prime is 31493653. The next prime is 31493677. The reversal of 31493664 is 46639413.

It is a tau number, because it is divible by the number of its divisors (48).

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 an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17362 + ... + 19089.

It is an arithmetic number, because the mean of its divisors is an integer number (1913730).

Almost surely, 2^31493664 is an apocalyptic number.

It is an amenable number.

31493664 is an abundant number, since it is smaller than the sum of its proper divisors (60365376).

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

31493664 is a wasteful number, since it uses less digits than its factorization.

31493664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36470 (or 36456 counting only the distinct ones).

The product of its digits is 46656, while the sum is 36.

The square root of 31493664 is about 5611.9215960311. The cubic root of 31493664 is about 315.7968036193.

The spelling of 31493664 in words is "thirty-one million, four hundred ninety-three thousand, six hundred sixty-four".