199845404 has 72 divisors (see below), whose sum is σ = 417466224. Its totient is φ = 82700800.

The previous prime is 199845403. The next prime is 199845463. The reversal of 199845404 is 404548991.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199845403) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2814689 + ... + 2814759.

It is an arithmetic number, because the mean of its divisors is an integer number (5798142).

Almost surely, 2^199845404 is an apocalyptic number.

It is an amenable number.

199845404 is an abundant number, since it is smaller than the sum of its proper divisors (217620820).

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

199845404 is a wasteful number, since it uses less digits than its factorization.

199845404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227 (or 154 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 199845404 is about 14136.6687730880. The cubic root of 199845404 is about 584.6528283195.

The spelling of 199845404 in words is "one hundred ninety-nine million, eight hundred forty-five thousand, four hundred four".