31405268 has 6 divisors (see below), whose sum is σ = 54959226. Its totient is φ = 15702632.

The previous prime is 31405219. The next prime is 31405277. The reversal of 31405268 is 86250413.

It can be written as a sum of positive squares in only one way, i.e., 21049744 + 10355524 = 4588^2 + 3218^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31405268.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3925655 + ... + 3925662.

It is an arithmetic number, because the mean of its divisors is an integer number (9159871).

Almost surely, 2^31405268 is an apocalyptic number.

It is an amenable number.

31405268 is a deficient number, since it is larger than the sum of its proper divisors (23553958).

31405268 is a wasteful number, since it uses less digits than its factorization.

31405268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7851321 (or 7851319 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 31405268 is about 5604.0403281918. The cubic root of 31405268 is about 315.5010686596.

The spelling of 31405268 in words is "thirty-one million, four hundred five thousand, two hundred sixty-eight".