31164690 has 16 divisors (see below), whose sum is σ = 74795328. Its totient is φ = 8310576.

The previous prime is 31164671. The next prime is 31164719. The reversal of 31164690 is 9646113.

It is a super-2 number, since 2×31164690² = 1942475805592200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 1038823 = 31164690 / (3 + 1 + 1 + 6 + 4 + 6 + 9 + 0).

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, 519382 + ... + 519441.

It is an arithmetic number, because the mean of its divisors is an integer number (4674708).

Almost surely, 2^31164690 is an apocalyptic number.

31164690 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31164690 is an abundant number, since it is smaller than the sum of its proper divisors (43630638).

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

31164690 is a wasteful number, since it uses less digits than its factorization.

31164690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1038833.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 31164690 is about 5582.5343706958. The cubic root of 31164690 is about 314.6933776182.

The spelling of 31164690 in words is "thirty-one million, one hundred sixty-four thousand, six hundred ninety".