3998888993 has 8 divisors (see below), whose sum is σ = 4411441440. Its totient is φ = 3594506080.

The previous prime is 3998888983. The next prime is 3998889001.

3998888993 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3998888993 - 2¹⁴ = 3998872609 is a prime.

It is a super-2 number, since 2×3998888993² = 31982226356673108098, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3998888993.

It is not an unprimeable number, because it can be changed into a prime (3998888953) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2041355 + ... + 2043312.

It is an arithmetic number, because the mean of its divisors is an integer number (551430180).

Almost surely, 2^3998888993 is an apocalyptic number.

It is an amenable number.

3998888993 is a deficient number, since it is larger than the sum of its proper divisors (412552447).

3998888993 is a wasteful number, since it uses less digits than its factorization.

3998888993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4084767.

The product of its digits is 241864704, while the sum is 74.

The square root of 3998888993 is about 63236.7693118489. The cubic root of 3998888993 is about 1587.2540705525.

The spelling of 3998888993 in words is "three billion, nine hundred ninety-eight million, eight hundred eighty-eight thousand, nine hundred ninety-three".