3989921783232 has 1344 divisors, whose sum is σ = 14479235456000. Its totient is φ = 968349634560.

The previous prime is 3989921783209. The next prime is 3989921783249. The reversal of 3989921783232 is 2323871299893.

It is a tau number, because it is divible by the number of its divisors (1344).

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 54656462748 + ... + 54656462820.

Almost surely, 2^{3989921783232} is an apocalyptic number.

3989921783232 is a gapful number since it is divisible by the number (32) 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 3989921783232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7239617728000).

3989921783232 is an abundant number, since it is smaller than the sum of its proper divisors (10489313672768).

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

3989921783232 is an equidigital number, since it uses as much as digits as its factorization.

3989921783232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188 (or 115 counting only the distinct ones).

The product of its digits is 70543872, while the sum is 66.

The spelling of 3989921783232 in words is "three trillion, nine hundred eighty-nine billion, nine hundred twenty-one million, seven hundred eighty-three thousand, two hundred thirty-two".