198221874 has 16 divisors (see below), whose sum is σ = 409232640. Its totient is φ = 63942480.

The previous prime is 198221861. The next prime is 198221899. The reversal of 198221874 is 478122891.

It is a super-2 number, since 2×198221874² = 78583822664143752, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 532669 + ... + 533040.

It is an arithmetic number, because the mean of its divisors is an integer number (25577040).

Almost surely, 2^198221874 is an apocalyptic number.

198221874 is an abundant number, since it is smaller than the sum of its proper divisors (211010766).

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

198221874 is a wasteful number, since it uses less digits than its factorization.

198221874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065745.

The product of its digits is 64512, while the sum is 42.

The square root of 198221874 is about 14079.1290213564. The cubic root of 198221874 is about 583.0652953787.

The spelling of 198221874 in words is "one hundred ninety-eight million, two hundred twenty-one thousand, eight hundred seventy-four".