3989230721280 has 432 divisors, whose sum is σ = 15779168705664. Its totient is φ = 911530229760.

The previous prime is 3989230721263. The next prime is 3989230721291. The reversal of 3989230721280 is 821270329893.

3989230721280 is a `hidden beast` number, since 39 + 8 + 9 + 2 + 307 + 21 + 280 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 340053015 + ... + 340064745.

Almost surely, 2^{3989230721280} is an apocalyptic number.

3989230721280 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 3989230721280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7889584352832).

3989230721280 is an abundant number, since it is smaller than the sum of its proper divisors (11789937984384).

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

3989230721280 is a wasteful number, since it uses less digits than its factorization.

3989230721280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15982 (or 15965 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 3989230721280 in words is "three trillion, nine hundred eighty-nine billion, two hundred thirty million, seven hundred twenty-one thousand, two hundred eighty".