31297086 has 12 divisors (see below), whose sum is σ = 67810392. Its totient is φ = 10432356.

The previous prime is 31297037. The next prime is 31297099. The reversal of 31297086 is 68079213.

It is a self number, because there is not a number n which added to its sum of digits gives 31297086.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 869346 + ... + 869381.

It is an arithmetic number, because the mean of its divisors is an integer number (5650866).

Almost surely, 2^31297086 is an apocalyptic number.

31297086 is an abundant number, since it is smaller than the sum of its proper divisors (36513306).

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

31297086 is a wasteful number, since it uses less digits than its factorization.

31297086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1738735 (or 1738732 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 31297086 is about 5594.3798583936. The cubic root of 31297086 is about 315.1383821314.

The spelling of 31297086 in words is "thirty-one million, two hundred ninety-seven thousand, eighty-six".