3999386464 has 48 divisors (see below), whose sum is σ = 8281018368. Its totient is φ = 1897644672.

The previous prime is 3999386431. The next prime is 3999386467. The reversal of 3999386464 is 4646839993.

3999386464 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3999386467) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72079 + ... + 114865.

It is an arithmetic number, because the mean of its divisors is an integer number (172521216).

Almost surely, 2^3999386464 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 3999386464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4140509184).

3999386464 is an abundant number, since it is smaller than the sum of its proper divisors (4281631904).

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

3999386464 is a wasteful number, since it uses less digits than its factorization.

3999386464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42947 (or 42939 counting only the distinct ones).

The product of its digits is 30233088, while the sum is 61.

The square root of 3999386464 is about 63240.7025893925. The cubic root of 3999386464 is about 1587.3198871773.

The spelling of 3999386464 in words is "three billion, nine hundred ninety-nine million, three hundred eighty-six thousand, four hundred sixty-four".