3994481568 has 576 divisors, whose sum is σ = 14892595200. Its totient is φ = 921231360.

The previous prime is 3994481567. The next prime is 3994481629. The reversal of 3994481568 is 8651844993.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (3994481567) 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 95 ways as a sum of consecutive naturals, for example, 16713193 + ... + 16713431.

It is an arithmetic number, because the mean of its divisors is an integer number (25855200).

Almost surely, 2^3994481568 is an apocalyptic number.

3994481568 is a gapful number since it is divisible by the number (38) 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 3994481568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7446297600).

3994481568 is an abundant number, since it is smaller than the sum of its proper divisors (10898113632).

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

3994481568 is a wasteful number, since it uses less digits than its factorization.

3994481568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313 (or 298 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 57.

The square root of 3994481568 is about 63201.9111103454. The cubic root of 3994481568 is about 1586.6707189439.

The spelling of 3994481568 in words is "three billion, nine hundred ninety-four million, four hundred eighty-one thousand, five hundred sixty-eight".