31116438 has 12 divisors (see below), whose sum is σ = 67418988. Its totient is φ = 10372140.

The previous prime is 31116431. The next prime is 31116439. The reversal of 31116438 is 83461113.

31116438 is a `hidden beast` number, since 3 + 1 + 11 + 643 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31116431) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 864328 + ... + 864363.

It is an arithmetic number, because the mean of its divisors is an integer number (5618249).

Almost surely, 2^31116438 is an apocalyptic number.

31116438 is an abundant number, since it is smaller than the sum of its proper divisors (36302550).

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

31116438 is a wasteful number, since it uses less digits than its factorization.

31116438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1728699 (or 1728696 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 31116438 is about 5578.2110035387. The cubic root of 31116438 is about 314.5308814479.

The spelling of 31116438 in words is "thirty-one million, one hundred sixteen thousand, four hundred thirty-eight".