3995879920 has 80 divisors (see below), whose sum is σ = 10065828960. Its totient is φ = 1469325312.

The previous prime is 3995879893. The next prime is 3995879977. The reversal of 3995879920 is 299785993.

3995879920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24316 + ... + 92644.

It is an arithmetic number, because the mean of its divisors is an integer number (125822862).

Almost surely, 2^3995879920 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 3995879920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5032914480).

3995879920 is an abundant number, since it is smaller than the sum of its proper divisors (6069949040).

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

3995879920 is a wasteful number, since it uses less digits than its factorization.

3995879920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68402 (or 68396 counting only the distinct ones).

The product of its (nonzero) digits is 11022480, while the sum is 61.

The square root of 3995879920 is about 63212.9727192133. The cubic root of 3995879920 is about 1586.8558464573.

The spelling of 3995879920 in words is "three billion, nine hundred ninety-five million, eight hundred seventy-nine thousand, nine hundred twenty".