3999870392 has 48 divisors (see below), whose sum is σ = 8739426960. Its totient is φ = 1711239936.

The previous prime is 3999870389. The next prime is 3999870397. The reversal of 3999870392 is 2930789993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3999870397) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 223853 + ... + 241059.

It is an arithmetic number, because the mean of its divisors is an integer number (182071395).

Almost surely, 2^3999870392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3999870392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4369713480).

3999870392 is an abundant number, since it is smaller than the sum of its proper divisors (4739556568).

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

3999870392 is a wasteful number, since it uses less digits than its factorization.

3999870392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17820 (or 17809 counting only the distinct ones).

The product of its (nonzero) digits is 6613488, while the sum is 59.

The square root of 3999870392 is about 63244.5285538599. The cubic root of 3999870392 is about 1587.3839067934.

The spelling of 3999870392 in words is "three billion, nine hundred ninety-nine million, eight hundred seventy thousand, three hundred ninety-two".