3990889408 has 56 divisors (see below), whose sum is σ = 8918106624. Its totient is φ = 1755513600.

The previous prime is 3990889369. The next prime is 3990889421. The reversal of 3990889408 is 8049880993.

It is a congruent number.

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, 69610 + ... + 113257.

It is an arithmetic number, because the mean of its divisors is an integer number (159251904).

Almost surely, 2^3990889408 is an apocalyptic number.

It is an amenable number.

3990889408 is an abundant number, since it is smaller than the sum of its proper divisors (4927217216).

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

3990889408 is a wasteful number, since it uses less digits than its factorization.

3990889408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182921 (or 182911 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 58.

The square root of 3990889408 is about 63173.4865904993. The cubic root of 3990889408 is about 1586.1949555394.

It can be divided in two parts, 3990 and 889408, that added together give a palindrome (893398).

The spelling of 3990889408 in words is "three billion, nine hundred ninety million, eight hundred eighty-nine thousand, four hundred eight".