198421080 has 256 divisors, whose sum is σ = 723824640. Its totient is φ = 42854400.

The previous prime is 198421079. The next prime is 198421141. The reversal of 198421080 is 80124891.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 531774 + ... + 532146.

It is an arithmetic number, because the mean of its divisors is an integer number (2827440).

Almost surely, 2^198421080 is an apocalyptic number.

198421080 is a gapful number since it is divisible by the number (10) 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 198421080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (361912320).

198421080 is an abundant number, since it is smaller than the sum of its proper divisors (525403560).

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

198421080 is a wasteful number, since it uses less digits than its factorization.

198421080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442 (or 438 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 198421080 is about 14086.2017591684. The cubic root of 198421080 is about 583.2605500121.

The spelling of 198421080 in words is "one hundred ninety-eight million, four hundred twenty-one thousand, eighty".