31039894 has 16 divisors (see below), whose sum is σ = 48362688. Its totient is φ = 14929992.

The previous prime is 31039891. The next prime is 31039933. The reversal of 31039894 is 49893013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31039891) 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, 3069 + ... + 8455.

It is an arithmetic number, because the mean of its divisors is an integer number (3022668).

Almost surely, 2^31039894 is an apocalyptic number.

31039894 is a deficient number, since it is larger than the sum of its proper divisors (17322794).

31039894 is a wasteful number, since it uses less digits than its factorization.

31039894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5499.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 31039894 is about 5571.3457979199. The cubic root of 31039894 is about 314.2727625713.

It can be divided in two parts, 310 and 39894, that added together give a palindrome (40204).

The spelling of 31039894 in words is "thirty-one million, thirty-nine thousand, eight hundred ninety-four".