31113894 has 64 divisors (see below), whose sum is σ = 76677120. Its totient is φ = 8220960.

The previous prime is 31113889. The next prime is 31113911. The reversal of 31113894 is 49831113.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 29427 + ... + 30465.

It is an arithmetic number, because the mean of its divisors is an integer number (1198080).

Almost surely, 2^31113894 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31113894, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38338560).

31113894 is an abundant number, since it is smaller than the sum of its proper divisors (45563226).

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

31113894 is a wasteful number, since it uses less digits than its factorization.

31113894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1105.

The product of its digits is 2592, while the sum is 30.

The square root of 31113894 is about 5577.9829687800. The cubic root of 31113894 is about 314.5223094688.

The spelling of 31113894 in words is "thirty-one million, one hundred thirteen thousand, eight hundred ninety-four".