31299672 has 32 divisors (see below), whose sum is σ = 78407280. Its totient is φ = 10412160.

The previous prime is 31299661. The next prime is 31299673. The reversal of 31299672 is 27699213.

It is a self number, because there is not a number n which added to its sum of digits gives 31299672.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31299673) 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 7 ways as a sum of consecutive naturals, for example, 14878 + ... + 16850.

Almost surely, 2^31299672 is an apocalyptic number.

It is an amenable number.

31299672 is an abundant number, since it is smaller than the sum of its proper divisors (47107608).

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

31299672 is a wasteful number, since it uses less digits than its factorization.

31299672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2643 (or 2639 counting only the distinct ones).

The product of its digits is 40824, while the sum is 39.

The square root of 31299672 is about 5594.6109784327. The cubic root of 31299672 is about 315.1470615913.

The spelling of 31299672 in words is "thirty-one million, two hundred ninety-nine thousand, six hundred seventy-two".