3994745616 has 135 divisors (see below), whose sum is σ = 11738206389. Its totient is φ = 1268125056.

The previous prime is 3994745609. The next prime is 3994745659. The reversal of 3994745616 is 6165474993.

The square root of 3994745616 is 63204.

It is a perfect power (a square), and thus also a powerful number.

3994745616 is a `hidden beast` number, since 3 + 9 + 9 + 4 + 74 + 561 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3720512016 + 274233600 = 60996^2 + 16560^2 .

It is an unprimeable number.

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 26 ways as a sum of consecutive naturals, for example, 17444190 + ... + 17444418.

Almost surely, 2^3994745616 is an apocalyptic number.

3994745616 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

3994745616 is the 63204-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3994745616

3994745616 is an abundant number, since it is smaller than the sum of its proper divisors (7743460773).

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

3994745616 is a wasteful number, since it uses less digits than its factorization.

3994745616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518 (or 257 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 54.

The cubic root of 3994745616 is about 1586.7056795090.

The spelling of 3994745616 in words is "three billion, nine hundred ninety-four million, seven hundred forty-five thousand, six hundred sixteen".