198409794 has 32 divisors (see below), whose sum is σ = 435573504. Its totient is φ = 59752080.

The previous prime is 198409789. The next prime is 198409811. The reversal of 198409794 is 497904891.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1537 + ... + 19979.

It is an arithmetic number, because the mean of its divisors is an integer number (13611672).

Almost surely, 2^198409794 is an apocalyptic number.

198409794 is an abundant number, since it is smaller than the sum of its proper divisors (237163710).

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

198409794 is a wasteful number, since it uses less digits than its factorization.

198409794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18622.

The product of its (nonzero) digits is 653184, while the sum is 51.

The square root of 198409794 is about 14085.8011486745. The cubic root of 198409794 is about 583.2494913696.

The spelling of 198409794 in words is "one hundred ninety-eight million, four hundred nine thousand, seven hundred ninety-four".