198220608 has 70 divisors (see below), whose sum is σ = 587603346. Its totient is φ = 66071808.

The previous prime is 198220577. The next prime is 198220613. The reversal of 198220608 is 806022891.

It can be written as a sum of positive squares in only one way, i.e., 169833024 + 28387584 = 13032^2 + 5328^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 13935 + ... + 24302.

Almost surely, 2^198220608 is an apocalyptic number.

198220608 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

198220608 is an abundant number, since it is smaller than the sum of its proper divisors (389382738).

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

198220608 is an equidigital number, since it uses as much as digits as its factorization.

198220608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38261 (or 38242 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 198220608 is about 14079.0840611170. The cubic root of 198220608 is about 583.0640540723.

The spelling of 198220608 in words is "one hundred ninety-eight million, two hundred twenty thousand, six hundred eight".