31038880 has 24 divisors (see below), whose sum is σ = 73329732. Its totient is φ = 12415488.

The previous prime is 31038877. The next prime is 31038883. The reversal of 31038880 is 8883013.

It is an interprime number because it is at equal distance from previous prime (31038877) and next prime (31038883).

It can be written as a sum of positive squares in 2 ways, for example, as 30869136 + 169744 = 5556^2 + 412^2 .

It is not an unprimeable number, because it can be changed into a prime (31038883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96837 + ... + 97156.

Almost surely, 2^31038880 is an apocalyptic number.

It is an amenable number.

31038880 is an abundant number, since it is smaller than the sum of its proper divisors (42290852).

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

31038880 is a wasteful number, since it uses less digits than its factorization.

31038880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194008 (or 194000 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 31038880 is about 5571.2547958247. The cubic root of 31038880 is about 314.2693403512.

The spelling of 31038880 in words is "thirty-one million, thirty-eight thousand, eight hundred eighty".