998444899 has 8 divisors (see below), whose sum is σ = 1018260720. Its totient is φ = 978665376.

The previous prime is 998444891. The next prime is 998444911.

998444899 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 998444899 - 2³ = 998444891 is a prime.

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 998444899.

It is not an unprimeable number, because it can be changed into a prime (998444891) 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, 50284 + ... + 67270.

It is an arithmetic number, because the mean of its divisors is an integer number (127282590).

Almost surely, 2^998444899 is an apocalyptic number.

998444899 is a deficient number, since it is larger than the sum of its proper divisors (19815821).

998444899 is a wasteful number, since it uses less digits than its factorization.

998444899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18149.

The product of its digits is 26873856, while the sum is 64.

The square root of 998444899 is about 31598.1787291610. The cubic root of 998444899 is about 999.4813640633.

The spelling of 998444899 in words is "nine hundred ninety-eight million, four hundred forty-four thousand, eight hundred ninety-nine".