199728594 has 36 divisors (see below), whose sum is σ = 468601146. Its totient is φ = 61454016.

The previous prime is 199728587. The next prime is 199728643. The reversal of 199728594 is 495827991.

It can be written as a sum of positive squares in 3 ways, for example, as 164480625 + 35247969 = 12825^2 + 5937^2 .

It is a super-2 number, since 2×199728594² = 79783022522433672, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 199728594.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 29787 + ... + 35870.

Almost surely, 2^199728594 is an apocalyptic number.

199728594 is an abundant number, since it is smaller than the sum of its proper divisors (268872552).

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

199728594 is a wasteful number, since it uses less digits than its factorization.

199728594 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65691 (or 65675 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 54.

The square root of 199728594 is about 14132.5367149709. The cubic root of 199728594 is about 584.5388959069.

The spelling of 199728594 in words is "one hundred ninety-nine million, seven hundred twenty-eight thousand, five hundred ninety-four".