3980321856 has 560 divisors, whose sum is σ = 14870338560. Its totient is φ = 1026432000.

The previous prime is 3980321819. The next prime is 3980321869. The reversal of 3980321856 is 6581230893.

It is a happy number.

3980321856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 15857731 + ... + 15857981.

It is an arithmetic number, because the mean of its divisors is an integer number (26554176).

Almost surely, 2^3980321856 is an apocalyptic number.

3980321856 is a gapful number since it is divisible by the number (36) 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 3980321856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7435169280).

3980321856 is an abundant number, since it is smaller than the sum of its proper divisors (10890016704).

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

3980321856 is a wasteful number, since it uses less digits than its factorization.

3980321856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324 (or 305 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 3980321856 is about 63089.7920110694. The cubic root of 3980321856 is about 1584.7936793874.

The spelling of 3980321856 in words is "three billion, nine hundred eighty million, three hundred twenty-one thousand, eight hundred fifty-six".