3996555880 has 64 divisors (see below), whose sum is σ = 9219608640. Its totient is φ = 1558351872.

The previous prime is 3996555847. The next prime is 3996555887. The reversal of 3996555880 is 885556993.

It is not an unprimeable number, because it can be changed into a prime (3996555887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 990427 + ... + 994453.

It is an arithmetic number, because the mean of its divisors is an integer number (144056385).

Almost surely, 2^3996555880 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 3996555880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4609804320).

3996555880 is an abundant number, since it is smaller than the sum of its proper divisors (5223052760).

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

3996555880 is a wasteful number, since it uses less digits than its factorization.

3996555880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4658 (or 4654 counting only the distinct ones).

The product of its (nonzero) digits is 11664000, while the sum is 58.

The square root of 3996555880 is about 63218.3191804401. The cubic root of 3996555880 is about 1586.9453211679.

The spelling of 3996555880 in words is "three billion, nine hundred ninety-six million, five hundred fifty-five thousand, eight hundred eighty".