31207672 has 32 divisors (see below), whose sum is σ = 60361200. Its totient is φ = 15119104.

The previous prime is 31207667. The next prime is 31207679. The reversal of 31207672 is 27670213.

It is a self number, because there is not a number n which added to its sum of digits gives 31207672.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31207679) 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, 37323 + ... + 38149.

Almost surely, 2^31207672 is an apocalyptic number.

It is an amenable number.

31207672 is a deficient number, since it is larger than the sum of its proper divisors (29153528).

31207672 is a wasteful number, since it uses less digits than its factorization.

31207672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975 (or 971 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 31207672 is about 5586.3827294592. The cubic root of 31207672 is about 314.8379850478.

Adding to 31207672 its reverse (27670213), we get a palindrome (58877885).

The spelling of 31207672 in words is "thirty-one million, two hundred seven thousand, six hundred seventy-two".