198819088 has 40 divisors (see below), whose sum is σ = 417214616. Its totient is φ = 91238400.

The previous prime is 198819079. The next prime is 198819091. The reversal of 198819088 is 880918891.

It can be written as a sum of positive squares in 4 ways, for example, as 23309584 + 175509504 = 4828^2 + 13248^2 .

It is a Harshad number since it is a multiple of its sum of digits (52).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35008 + ... + 40288.

Almost surely, 2^198819088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198819088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (208607308).

198819088 is an abundant number, since it is smaller than the sum of its proper divisors (218395528).

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

198819088 is a wasteful number, since it uses less digits than its factorization.

198819088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5483 (or 5477 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 52.

The square root of 198819088 is about 14100.3222658207. The cubic root of 198819088 is about 583.6502722491.

The spelling of 198819088 in words is "one hundred ninety-eight million, eight hundred nineteen thousand, eighty-eight".