198420 has 24 divisors (see below), whose sum is σ = 555744. Its totient is φ = 52896.

The previous prime is 198413. The next prime is 198427. The reversal of 198420 is 24891.

It is an interprime number because it is at equal distance from previous prime (198413) and next prime (198427).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1594 + ... + 1713.

It is an arithmetic number, because the mean of its divisors is an integer number (23156).

2¹⁹⁸⁴²⁰ is an apocalyptic number.

198420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198420 is an abundant number, since it is smaller than the sum of its proper divisors (357324).

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

198420 is a wasteful number, since it uses less digits than its factorization.

198420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3319 (or 3317 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 198420 is about 445.4435991234. The cubic root of 198420 is about 58.3259491787.

The spelling of 198420 in words is "one hundred ninety-eight thousand, four hundred twenty".