3999541968 has 160 divisors (see below), whose sum is σ = 11755497600. Its totient is φ = 1301474304.

The previous prime is 3999541963. The next prime is 3999541993. The reversal of 3999541968 is 8691459993.

3999541968 is a `hidden beast` number, since 399 + 9 + 54 + 196 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3999541963) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7028788 + ... + 7029356.

It is an arithmetic number, because the mean of its divisors is an integer number (73471860).

Almost surely, 2^3999541968 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 3999541968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5877748800).

3999541968 is an abundant number, since it is smaller than the sum of its proper divisors (7755955632).

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

3999541968 is a wasteful number, since it uses less digits than its factorization.

3999541968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946 (or 934 counting only the distinct ones).

The product of its digits is 18895680, while the sum is 63.

The square root of 3999541968 is about 63241.9320387984. The cubic root of 3999541968 is about 1587.3404596155.

The spelling of 3999541968 in words is "three billion, nine hundred ninety-nine million, five hundred forty-one thousand, nine hundred sixty-eight".