998417880 has 128 divisors (see below), whose sum is σ = 3335731200. Its totient is φ = 265631616.

The previous prime is 998417863. The next prime is 998417891. The reversal of 998417880 is 88714899.

998417880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 654799 + ... + 656321.

It is an arithmetic number, because the mean of its divisors is an integer number (26060400).

Almost surely, 2^998417880 is an apocalyptic number.

998417880 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 998417880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1667865600).

998417880 is an abundant number, since it is smaller than the sum of its proper divisors (2337313320).

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

998417880 is a wasteful number, since it uses less digits than its factorization.

998417880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2150 (or 2140 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 54.

The square root of 998417880 is about 31597.7511858043. The cubic root of 998417880 is about 999.4723482993.

The spelling of 998417880 in words is "nine hundred ninety-eight million, four hundred seventeen thousand, eight hundred eighty".