3990890860 has 24 divisors (see below), whose sum is σ = 9142768656. Its totient is φ = 1451232960.

The previous prime is 3990890821. The next prime is 3990890867. The reversal of 3990890860 is 680980993.

3990890860 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 3990890798 and 3990890807.

It is not an unprimeable number, because it can be changed into a prime (3990890867) 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, 9069987 + ... + 9070426.

It is an arithmetic number, because the mean of its divisors is an integer number (380948694).

Almost surely, 2^3990890860 is an apocalyptic number.

It is an amenable number.

3990890860 is an abundant number, since it is smaller than the sum of its proper divisors (5151877796).

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

3990890860 is a wasteful number, since it uses less digits than its factorization.

3990890860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18140433 (or 18140431 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 52.

The square root of 3990890860 is about 63173.4980826612. The cubic root of 3990890860 is about 1586.1951479071.

The spelling of 3990890860 in words is "three billion, nine hundred ninety million, eight hundred ninety thousand, eight hundred sixty".