31269890 has 16 divisors (see below), whose sum is σ = 56867832. Its totient is φ = 12378624.

The previous prime is 31269863. The next prime is 31269907. The reversal of 31269890 is 9896213.

It can be written as a sum of positive squares in 4 ways, for example, as 30327049 + 942841 = 5507^2 + 971^2 .

It is a super-2 number, since 2×31269890² = 1955612041224200, which contains 22 as substring.

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, 15149 + ... + 17088.

Almost surely, 2^31269890 is an apocalyptic number.

31269890 is a deficient number, since it is larger than the sum of its proper divisors (25597942).

31269890 is a wasteful number, since it uses less digits than its factorization.

31269890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32341.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 31269890 is about 5591.9486764454. The cubic root of 31269890 is about 315.0470745134.

The spelling of 31269890 in words is "thirty-one million, two hundred sixty-nine thousand, eight hundred ninety".