3959318840 has 64 divisors (see below), whose sum is σ = 9114940800. Its totient is φ = 1547440128.

The previous prime is 3959318821. The next prime is 3959318843. The reversal of 3959318840 is 488139593.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3959318843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 300062 + ... + 312978.

It is an arithmetic number, because the mean of its divisors is an integer number (142420950).

Almost surely, 2^3959318840 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 3959318840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4557470400).

3959318840 is an abundant number, since it is smaller than the sum of its proper divisors (5155621960).

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

3959318840 is a wasteful number, since it uses less digits than its factorization.

3959318840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13104 (or 13100 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 50.

The square root of 3959318840 is about 62923.1184859746. The cubic root of 3959318840 is about 1582.0012615577.

The spelling of 3959318840 in words is "three billion, nine hundred fifty-nine million, three hundred eighteen thousand, eight hundred forty".