31268439 has 18 divisors (see below), whose sum is σ = 46264920. Its totient is φ = 20350008.

The previous prime is 31268401. The next prime is 31268443. The reversal of 31268439 is 93486213.

It is not a de Polignac number, because 31268439 - 2⁸ = 31268183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31268449) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 15702 + ... + 17580.

Almost surely, 2^31268439 is an apocalyptic number.

31268439 is a deficient number, since it is larger than the sum of its proper divisors (14996481).

31268439 is a wasteful number, since it uses less digits than its factorization.

31268439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1971 (or 1925 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 31268439 is about 5591.8189348369. The cubic root of 31268439 is about 315.0422014510.

The spelling of 31268439 in words is "thirty-one million, two hundred sixty-eight thousand, four hundred thirty-nine".