3998805699 has 16 divisors (see below), whose sum is σ = 6124044800. Its totient is φ = 2273546880.

The previous prime is 3998805677. The next prime is 3998805703. The reversal of 3998805699 is 9965088993.

It is not a de Polignac number, because 3998805699 - 2⁷ = 3998805571 is a prime.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3998805619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 474262 + ... + 482619.

It is an arithmetic number, because the mean of its divisors is an integer number (382752800).

Almost surely, 2^3998805699 is an apocalyptic number.

3998805699 is a deficient number, since it is larger than the sum of its proper divisors (2125239101).

3998805699 is a wasteful number, since it uses less digits than its factorization.

3998805699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 957090.

The product of its (nonzero) digits is 37791360, while the sum is 66.

The square root of 3998805699 is about 63236.1107200625. The cubic root of 3998805699 is about 1587.2430500200.

The spelling of 3998805699 in words is "three billion, nine hundred ninety-eight million, eight hundred five thousand, six hundred ninety-nine".