998400 has 132 divisors (see below), whose sum is σ = 3553592. Its totient is φ = 245760.

The previous prime is 998399. The next prime is 998411. The reversal of 998400 is 4899.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a nialpdrome in base 10.

It is a zygodrome in base 2.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 998400.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76794 + ... + 76806.

2⁹⁹⁸⁴⁰⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 998400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1776796).

998400 is an abundant number, since it is smaller than the sum of its proper divisors (2555192).

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

998400 is a wasteful number, since it uses less digits than its factorization.

998400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46 (or 23 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 998400 is about 999.1996797437. The cubic root of 998400 is about 99.9466381969.

The spelling of 998400 in words is "nine hundred ninety-eight thousand, four hundred".