198988026 has 32 divisors (see below), whose sum is σ = 443568960. Its totient is φ = 59141376.

The previous prime is 198988021. The next prime is 198988081. The reversal of 198988026 is 620889891.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 198988026.

It is not an unprimeable number, because it can be changed into a prime (198988021) 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, 49401 + ... + 53276.

It is an arithmetic number, because the mean of its divisors is an integer number (13861530).

Almost surely, 2^198988026 is an apocalyptic number.

198988026 is an abundant number, since it is smaller than the sum of its proper divisors (244580934).

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

198988026 is a wasteful number, since it uses less digits than its factorization.

198988026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102718.

The product of its (nonzero) digits is 497664, while the sum is 51.

The square root of 198988026 is about 14106.3115661040. The cubic root of 198988026 is about 583.8155360518.

The spelling of 198988026 in words is "one hundred ninety-eight million, nine hundred eighty-eight thousand, twenty-six".