31869894 has 24 divisors (see below), whose sum is σ = 74146968. Its totient is φ = 9105600.

The previous prime is 31869889. The next prime is 31869911. The reversal of 31869894 is 49896813.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53907 + ... + 54494.

It is an arithmetic number, because the mean of its divisors is an integer number (3089457).

Almost surely, 2^31869894 is an apocalyptic number.

31869894 is an abundant number, since it is smaller than the sum of its proper divisors (42277074).

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

31869894 is a wasteful number, since it uses less digits than its factorization.

31869894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108420 (or 108413 counting only the distinct ones).

The product of its digits is 373248, while the sum is 48.

The square root of 31869894 is about 5645.3426822470. The cubic root of 31869894 is about 317.0493542689.

The spelling of 31869894 in words is "thirty-one million, eight hundred sixty-nine thousand, eight hundred ninety-four".