998420 has 12 divisors (see below), whose sum is σ = 2096724. Its totient is φ = 399360.

The previous prime is 998419. The next prime is 998423. The reversal of 998420 is 24899.

998420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 643204 + 355216 = 802^2 + 596^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a nialpdrome in base 10.

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 998420.

It is not an unprimeable number, because it can be changed into a prime (998423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24941 + ... + 24980.

It is an arithmetic number, because the mean of its divisors is an integer number (174727).

2⁹⁹⁸⁴²⁰ is an apocalyptic number.

It is an amenable number.

998420 is an abundant number, since it is smaller than the sum of its proper divisors (1098304).

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

998420 is a wasteful number, since it uses less digits than its factorization.

998420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49930 (or 49928 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 998420 is about 999.2096877032. The cubic root of 998420 is about 99.9473055712.

The spelling of 998420 in words is "nine hundred ninety-eight thousand, four hundred twenty".