3989704320 has 384 divisors, whose sum is σ = 16050752640. Its totient is φ = 894246912.

The previous prime is 3989704297. The next prime is 3989704321. The reversal of 3989704320 is 234079893.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (384).

It is a super-2 number, since 2×3989704320² = 31835481122053324800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (3989704321) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2136027 + ... + 2137893.

It is an arithmetic number, because the mean of its divisors is an integer number (41798835).

Almost surely, 2^3989704320 is an apocalyptic number.

3989704320 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3989704320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8025376320).

3989704320 is an abundant number, since it is smaller than the sum of its proper divisors (12061048320).

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

3989704320 is a wasteful number, since it uses less digits than its factorization.

3989704320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1952 (or 1937 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 3989704320 is about 63164.1062629719. The cubic root of 3989704320 is about 1586.0379340076.

The spelling of 3989704320 in words is "three billion, nine hundred eighty-nine million, seven hundred four thousand, three hundred twenty".