31297894 has 16 divisors (see below), whose sum is σ = 50130432. Its totient is φ = 14619528.

The previous prime is 31297853. The next prime is 31297913. The reversal of 31297894 is 49879213.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a self number, because there is not a number n which added to its sum of digits gives 31297894.

It is a congruent number.

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, 5934 + ... + 9889.

It is an arithmetic number, because the mean of its divisors is an integer number (3133152).

Almost surely, 2^31297894 is an apocalyptic number.

31297894 is a deficient number, since it is larger than the sum of its proper divisors (18832538).

31297894 is a wasteful number, since it uses less digits than its factorization.

31297894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15891.

The product of its digits is 108864, while the sum is 43.

The square root of 31297894 is about 5594.4520732597. The cubic root of 31297894 is about 315.1410940944.

The spelling of 31297894 in words is "thirty-one million, two hundred ninety-seven thousand, eight hundred ninety-four".