31380860 has 24 divisors (see below), whose sum is σ = 75314400. Its totient is φ = 10759104.

The previous prime is 31380859. The next prime is 31380893. The reversal of 31380860 is 6808313.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111935 + ... + 112214.

It is an arithmetic number, because the mean of its divisors is an integer number (3138100).

Almost surely, 2^31380860 is an apocalyptic number.

It is an amenable number.

31380860 is an abundant number, since it is smaller than the sum of its proper divisors (43933540).

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

31380860 is a wasteful number, since it uses less digits than its factorization.

31380860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224165 (or 224163 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 31380860 is about 5601.8621903792. The cubic root of 31380860 is about 315.4193122491.

The spelling of 31380860 in words is "thirty-one million, three hundred eighty thousand, eight hundred sixty".