998280 has 96 divisors (see below), whose sum is σ = 3369600. Its totient is φ = 256128.

The previous prime is 998273. The next prime is 998281. The reversal of 998280 is 82899.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (998281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16891 + ... + 16949.

It is an arithmetic number, because the mean of its divisors is an integer number (35100).

2⁹⁹⁸²⁸⁰ is an apocalyptic number.

998280 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 998280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1684800).

998280 is an abundant number, since it is smaller than the sum of its proper divisors (2371320).

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

998280 is a wasteful number, since it uses less digits than its factorization.

998280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 998280 is about 999.1396298816. The cubic root of 998280 is about 99.9426337641.

998280 divided by its sum of digits (36) gives a triangular number (27730 = T₂₃₅).

It can be divided in two parts, 9 and 98280, that added together give a palindrome (98289).

The spelling of 998280 in words is "nine hundred ninety-eight thousand, two hundred eighty".