31042860 has 24 divisors (see below), whose sum is σ = 86920176. Its totient is φ = 8278080.

The previous prime is 31042853. The next prime is 31042871. The reversal of 31042860 is 6824013.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 31042860.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258631 + ... + 258750.

It is an arithmetic number, because the mean of its divisors is an integer number (3621674).

Almost surely, 2^31042860 is an apocalyptic number.

31042860 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31042860 is an abundant number, since it is smaller than the sum of its proper divisors (55877316).

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

31042860 is a wasteful number, since it uses less digits than its factorization.

31042860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517393 (or 517391 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 31042860 is about 5571.6119750033. The cubic root of 31042860 is about 314.2827723062.

Adding to 31042860 its reverse (6824013), we get a palindrome (37866873).

The spelling of 31042860 in words is "thirty-one million, forty-two thousand, eight hundred sixty".