31868692 has 12 divisors (see below), whose sum is σ = 57277780. Its totient is φ = 15503616.

The previous prime is 31868689. The next prime is 31868723. The reversal of 31868692 is 29686813.

It can be written as a sum of positive squares in 2 ways, for example, as 27185796 + 4682896 = 5214^2 + 2164^2 .

It is a super-2 number, since 2×31868692² = 2031227059581728, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107517 + ... + 107812.

Almost surely, 2^31868692 is an apocalyptic number.

It is an amenable number.

31868692 is a deficient number, since it is larger than the sum of its proper divisors (25409088).

31868692 is a wasteful number, since it uses less digits than its factorization.

31868692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215370 (or 215368 counting only the distinct ones).

The product of its digits is 124416, while the sum is 43.

The square root of 31868692 is about 5645.2362218068. The cubic root of 31868692 is about 317.0453682907.

The spelling of 31868692 in words is "thirty-one million, eight hundred sixty-eight thousand, six hundred ninety-two".