31084090 has 8 divisors (see below), whose sum is σ = 55951380. Its totient is φ = 12433632.

The previous prime is 31084087. The next prime is 31084093. The reversal of 31084090 is 9048013.

It is an interprime number because it is at equal distance from previous prime (31084087) and next prime (31084093).

It can be written as a sum of positive squares in 2 ways, for example, as 26967249 + 4116841 = 5193^2 + 2029^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×31084090² = 1932441302256200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31084093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1554195 + ... + 1554214.

Almost surely, 2^31084090 is an apocalyptic number.

31084090 is a deficient number, since it is larger than the sum of its proper divisors (24867290).

31084090 is a wasteful number, since it uses less digits than its factorization.

31084090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3108416.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 31084090 is about 5575.3107536710. The cubic root of 31084090 is about 314.4218504088.

The spelling of 31084090 in words is "thirty-one million, eighty-four thousand, ninety".