4389439872 has 64 divisors (see below), whose sum is σ = 11737854000. Its totient is φ = 1453307904.

The previous prime is 4389439867. The next prime is 4389439889. The reversal of 4389439872 is 2789349834.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18858 + ... + 95574.

Almost surely, 2^4389439872 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 4389439872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5868927000).

4389439872 is an abundant number, since it is smaller than the sum of its proper divisors (7348414128).

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

4389439872 is a wasteful number, since it uses less digits than its factorization.

4389439872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76883 (or 76871 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 57.

The square root of 4389439872 is about 66252.8480293489. The cubic root of 4389439872 is about 1637.3305611212.

The spelling of 4389439872 in words is "four billion, three hundred eighty-nine million, four hundred thirty-nine thousand, eight hundred seventy-two".