998885879 has 8 divisors (see below), whose sum is σ = 1056967680. Its totient is φ = 941355000.

The previous prime is 998885869. The next prime is 998885887. The reversal of 998885879 is 978588899.

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

It is not a de Polignac number, because 998885879 - 2⁸ = 998885623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998885809) 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 7 ways as a sum of consecutive naturals, for example, 133997 + ... + 141254.

It is an arithmetic number, because the mean of its divisors is an integer number (132120960).

Almost surely, 2^998885879 is an apocalyptic number.

998885879 is a deficient number, since it is larger than the sum of its proper divisors (58081801).

998885879 is a wasteful number, since it uses less digits than its factorization.

998885879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275461.

The product of its digits is 104509440, while the sum is 71.

The square root of 998885879 is about 31605.1558926704. The cubic root of 998885879 is about 999.6284883295.

The spelling of 998885879 in words is "nine hundred ninety-eight million, eight hundred eighty-five thousand, eight hundred seventy-nine".