3999008964 has 96 divisors (see below), whose sum is σ = 10228095360. Its totient is φ = 1211673600.

The previous prime is 3999008963. The next prime is 3999008999. The reversal of 3999008964 is 4698009993.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (3999008963) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 566722 + ... + 573734.

It is an arithmetic number, because the mean of its divisors is an integer number (106542660).

Almost surely, 2^3999008964 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 3999008964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5114047680).

3999008964 is an abundant number, since it is smaller than the sum of its proper divisors (6229086396).

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

3999008964 is a wasteful number, since it uses less digits than its factorization.

3999008964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7141 (or 7139 counting only the distinct ones).

The product of its (nonzero) digits is 3779136, while the sum is 57.

The square root of 3999008964 is about 63237.7178905121. The cubic root of 3999008964 is about 1587.2699435074.

The spelling of 3999008964 in words is "three billion, nine hundred ninety-nine million, eight thousand, nine hundred sixty-four".