3990868 has 24 divisors (see below), whose sum is σ = 8330112. Its totient is φ = 1635744.

The previous prime is 3990863. The next prime is 3990901. The reversal of 3990868 is 8680993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3990863) 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, 2455 + ... + 3742.

It is an arithmetic number, because the mean of its divisors is an integer number (347088).

Almost surely, 2^3990868 is an apocalyptic number.

It is an amenable number.

3990868 is an abundant number, since it is smaller than the sum of its proper divisors (4339244).

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

3990868 is a wasteful number, since it uses less digits than its factorization.

3990868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6231 (or 6229 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 3990868 is about 1997.7156954882. The cubic root of 3990868 is about 158.6192119303.

The spelling of 3990868 in words is "three million, nine hundred ninety thousand, eight hundred sixty-eight".