3131868 has 24 divisors (see below), whose sum is σ = 7544320. Its totient is φ = 1010160.

The previous prime is 3131861. The next prime is 3131879. The reversal of 3131868 is 8681313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3838 + ... + 4581.

Almost surely, 2^3131868 is an apocalyptic number.

It is an amenable number.

3131868 is an abundant number, since it is smaller than the sum of its proper divisors (4412452).

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

3131868 is a wasteful number, since it uses less digits than its factorization.

3131868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8457 (or 8455 counting only the distinct ones).

The product of its digits is 3456, while the sum is 30.

The square root of 3131868 is about 1769.7084505647. The cubic root of 3131868 is about 146.3079133631.

The spelling of 3131868 in words is "three million, one hundred thirty-one thousand, eight hundred sixty-eight".