3999239802 has 12 divisors (see below), whose sum is σ = 8665019610. Its totient is φ = 1333079928.

The previous prime is 3999239801. The next prime is 3999239807. The reversal of 3999239802 is 2089329993.

It can be written as a sum of positive squares in only one way, i.e., 3019612401 + 979627401 = 54951^2 + 31299^2 .

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (3999239801) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 111089977 + ... + 111090012.

Almost surely, 2^3999239802 is an apocalyptic number.

3999239802 is an abundant number, since it is smaller than the sum of its proper divisors (4665779808).

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

3999239802 is a wasteful number, since it uses less digits than its factorization.

3999239802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222179997 (or 222179994 counting only the distinct ones).

The product of its (nonzero) digits is 1889568, while the sum is 54.

The square root of 3999239802 is about 63239.5430249144. The cubic root of 3999239802 is about 1587.3004840049.

The spelling of 3999239802 in words is "three billion, nine hundred ninety-nine million, two hundred thirty-nine thousand, eight hundred two".