31012608 has 72 divisors (see below), whose sum is σ = 90066816. Its totient is φ = 9395200.

The previous prime is 31012577. The next prime is 31012613. The reversal of 31012608 is 80621013.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6613 + ... + 10283.

It is an arithmetic number, because the mean of its divisors is an integer number (1250928).

Almost surely, 2^31012608 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 31012608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45033408).

31012608 is an abundant number, since it is smaller than the sum of its proper divisors (59054208).

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

31012608 is a wasteful number, since it uses less digits than its factorization.

31012608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3701 (or 3687 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 31012608 is about 5568.8964795550. The cubic root of 31012608 is about 314.1806471306.

The spelling of 31012608 in words is "thirty-one million, twelve thousand, six hundred eight".