31442894 has 16 divisors (see below), whose sum is σ = 57073248. Its totient is φ = 12682752.

The previous prime is 31442893. The next prime is 31442921. The reversal of 31442894 is 49824413.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31442893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65819 + ... + 66294.

It is an arithmetic number, because the mean of its divisors is an integer number (3567078).

Almost surely, 2^31442894 is an apocalyptic number.

31442894 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

31442894 is a deficient number, since it is larger than the sum of its proper divisors (25630354).

31442894 is a wasteful number, since it uses less digits than its factorization.

31442894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132139.

The product of its digits is 27648, while the sum is 35.

The square root of 31442894 is about 5607.3963655158. The cubic root of 31442894 is about 315.6270168025.

It can be divided in two parts, 3 and 1442894, that added together give a cube (1442897 = 113³).

The spelling of 31442894 in words is "thirty-one million, four hundred forty-two thousand, eight hundred ninety-four".