3979339640 has 128 divisors (see below), whose sum is σ = 9483687360. Its totient is φ = 1500954624.

The previous prime is 3979339621. The next prime is 3979339667. The reversal of 3979339640 is 469339793.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7608419 + ... + 7608941.

Almost surely, 2^3979339640 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 3979339640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4741843680).

3979339640 is an abundant number, since it is smaller than the sum of its proper divisors (5504347720).

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

3979339640 is a wasteful number, since it uses less digits than its factorization.

3979339640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721 (or 717 counting only the distinct ones).

The product of its (nonzero) digits is 3306744, while the sum is 53.

The square root of 3979339640 is about 63082.0072603908. The cubic root of 3979339640 is about 1584.6633098827.

The spelling of 3979339640 in words is "three billion, nine hundred seventy-nine million, three hundred thirty-nine thousand, six hundred forty".