31738868 has 36 divisors (see below), whose sum is σ = 65423232. Its totient is φ = 13431600.

The previous prime is 31738853. The next prime is 31738897. The reversal of 31738868 is 86883713.

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, 15293 + ... + 17243.

It is an arithmetic number, because the mean of its divisors is an integer number (1817312).

Almost surely, 2^31738868 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31738868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32711616).

31738868 is an abundant number, since it is smaller than the sum of its proper divisors (33684364).

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

31738868 is a wasteful number, since it uses less digits than its factorization.

31738868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2052 (or 2043 counting only the distinct ones).

The product of its digits is 193536, while the sum is 44.

The square root of 31738868 is about 5633.7259429262. The cubic root of 31738868 is about 316.6142647670.

The spelling of 31738868 in words is "thirty-one million, seven hundred thirty-eight thousand, eight hundred sixty-eight".