3990689989 has 24 divisors (see below), whose sum is σ = 4769937536. Its totient is φ = 3316183200.

The previous prime is 3990689951. The next prime is 3990690017. The reversal of 3990689989 is 9899860993.

It is not a de Polignac number, because 3990689989 - 2¹³ = 3990681797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3990689929) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 149704 + ... + 174334.

Almost surely, 2^3990689989 is an apocalyptic number.

It is an amenable number.

3990689989 is a deficient number, since it is larger than the sum of its proper divisors (779247547).

3990689989 is a wasteful number, since it uses less digits than its factorization.

3990689989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24769 (or 24758 counting only the distinct ones).

The product of its (nonzero) digits is 68024448, while the sum is 70.

The square root of 3990689989 is about 63171.9082266794. The cubic root of 3990689989 is about 1586.1685351397.

The spelling of 3990689989 in words is "three billion, nine hundred ninety million, six hundred eighty-nine thousand, nine hundred eighty-nine".