198191374 has 16 divisors (see below), whose sum is σ = 301529088. Its totient is φ = 97691832.

The previous prime is 198191363. The next prime is 198191381. The reversal of 198191374 is 473191891.

It is a self number, because there is not a number n which added to its sum of digits gives 198191374.

It is a congruent number.

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, 39009 + ... + 43795.

It is an arithmetic number, because the mean of its divisors is an integer number (18845568).

Almost surely, 2^198191374 is an apocalyptic number.

198191374 is a deficient number, since it is larger than the sum of its proper divisors (103337714).

198191374 is a wasteful number, since it uses less digits than its factorization.

198191374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5079.

The product of its digits is 54432, while the sum is 43.

The square root of 198191374 is about 14078.0458160925. The cubic root of 198191374 is about 583.0353888177.

The spelling of 198191374 in words is "one hundred ninety-eight million, one hundred ninety-one thousand, three hundred seventy-four".