3999980000 has 60 divisors (see below), whose sum is σ = 9840600000. Its totient is φ = 1599984000.

The previous prime is 3999979993. The next prime is 3999980021. The reversal of 3999980000 is 899993.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 80000 + ... + 119999.

It is an arithmetic number, because the mean of its divisors is an integer number (164010000).

Almost surely, 2^3999980000 is an apocalyptic number.

It is an amenable number.

3999980000 is an abundant number, since it is smaller than the sum of its proper divisors (5840620000).

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

3999980000 is an equidigital number, since it uses as much as digits as its factorization.

3999980000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200029 (or 200006 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 47.

The square root of 3999980000 is about 63245.3950892869. The cubic root of 3999980000 is about 1587.3984062954.

The spelling of 3999980000 in words is "three billion, nine hundred ninety-nine million, nine hundred eighty thousand".