198478080 has 144 divisors (see below), whose sum is σ = 704444160. Its totient is φ = 52918272.

The previous prime is 198478073. The next prime is 198478081. The reversal of 198478080 is 80874891.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (198478081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31689 + ... + 37431.

Almost surely, 2^198478080 is an apocalyptic number.

198478080 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 198478080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (352222080).

198478080 is an abundant number, since it is smaller than the sum of its proper divisors (505966080).

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

198478080 is an equidigital number, since it uses as much as digits as its factorization.

198478080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5773 (or 5753 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The square root of 198478080 is about 14088.2248704370. The cubic root of 198478080 is about 583.3163953358.

The spelling of 198478080 in words is "one hundred ninety-eight million, four hundred seventy-eight thousand, eighty".