4398399864 has 72 divisors (see below), whose sum is σ = 12243263760. Its totient is φ = 1426476096.

The previous prime is 4398399857. The next prime is 4398399883. The reversal of 4398399864 is 4689938934.

It is a tau number, because it is divible by the number of its divisors (72).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 76257 + ... + 120879.

It is an arithmetic number, because the mean of its divisors is an integer number (170045330).

Almost surely, 2^4398399864 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 4398399864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6121631880).

4398399864 is an abundant number, since it is smaller than the sum of its proper divisors (7844863896).

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

4398399864 is a wasteful number, since it uses less digits than its factorization.

4398399864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44709 (or 44665 counting only the distinct ones).

The product of its digits is 40310784, while the sum is 63.

The square root of 4398399864 is about 66320.4332313956. The cubic root of 4398399864 is about 1638.4438768955.

The spelling of 4398399864 in words is "four billion, three hundred ninety-eight million, three hundred ninety-nine thousand, eight hundred sixty-four".