31009268 has 6 divisors (see below), whose sum is σ = 54266226. Its totient is φ = 15504632.

The previous prime is 31009261. The next prime is 31009327. The reversal of 31009268 is 86290013.

It can be written as a sum of positive squares in only one way, i.e., 24186724 + 6822544 = 4918^2 + 2612^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31009268.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31009261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3876155 + ... + 3876162.

It is an arithmetic number, because the mean of its divisors is an integer number (9044371).

Almost surely, 2^31009268 is an apocalyptic number.

It is an amenable number.

31009268 is a deficient number, since it is larger than the sum of its proper divisors (23256958).

31009268 is a wasteful number, since it uses less digits than its factorization.

31009268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7752321 (or 7752319 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 31009268 is about 5568.5965916019. The cubic root of 31009268 is about 314.1693678359.

The spelling of 31009268 in words is "thirty-one million, nine thousand, two hundred sixty-eight".