31090108 has 36 divisors (see below), whose sum is σ = 63840000. Its totient is φ = 13208832.

The previous prime is 31090091. The next prime is 31090133. The reversal of 31090108 is 80109013.

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, 24268 + ... + 25516.

Almost surely, 2^31090108 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 31090108, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31920000).

31090108 is an abundant number, since it is smaller than the sum of its proper divisors (32749892).

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

31090108 is a wasteful number, since it uses less digits than its factorization.

31090108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1394 (or 1385 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 31090108 is about 5575.8504284100. The cubic root of 31090108 is about 314.4421401947.

The spelling of 31090108 in words is "thirty-one million, ninety thousand, one hundred eight".