31868404 has 12 divisors (see below), whose sum is σ = 59050404. Its totient is φ = 14996864.

The previous prime is 31868401. The next prime is 31868407. The reversal of 31868404 is 40486813.

It is an interprime number because it is at equal distance from previous prime (31868401) and next prime (31868407).

It can be written as a sum of positive squares in 2 ways, for example, as 13395600 + 18472804 = 3660^2 + 4298^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a self number, because there is not a number n which added to its sum of digits gives 31868404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31868401) 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, 234259 + ... + 234394.

It is an arithmetic number, because the mean of its divisors is an integer number (4920867).

Almost surely, 2^31868404 is an apocalyptic number.

31868404 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

31868404 is a deficient number, since it is larger than the sum of its proper divisors (27182000).

31868404 is a wasteful number, since it uses less digits than its factorization.

31868404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468674 (or 468672 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 31868404 is about 5645.2107135164. The cubic root of 31868404 is about 317.0444132327.

The spelling of 31868404 in words is "thirty-one million, eight hundred sixty-eight thousand, four hundred four".