3964431520 has 96 divisors (see below), whose sum is σ = 10717878528. Its totient is φ = 1357467648.

The previous prime is 3964431509. The next prime is 3964431539. The reversal of 3964431520 is 251344693.

It is a self number, because there is not a number n which added to its sum of digits gives 3964431520.

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, 1092429 + ... + 1096051.

It is an arithmetic number, because the mean of its divisors is an integer number (111644568).

Almost surely, 2^3964431520 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 3964431520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5358939264).

3964431520 is an abundant number, since it is smaller than the sum of its proper divisors (6753447008).

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

3964431520 is a wasteful number, since it uses less digits than its factorization.

3964431520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4622 (or 4614 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 3964431520 is about 62963.7317826699. The cubic root of 3964431520 is about 1582.6819162835.

The spelling of 3964431520 in words is "three billion, nine hundred sixty-four million, four hundred thirty-one thousand, five hundred twenty".