199888190 has 8 divisors (see below), whose sum is σ = 359798760. Its totient is φ = 79955272.

The previous prime is 199888187. The next prime is 199888207. The reversal of 199888190 is 91888991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×199888190² = 79910577002952200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9994400 + ... + 9994419.

It is an arithmetic number, because the mean of its divisors is an integer number (44974845).

Almost surely, 2^199888190 is an apocalyptic number.

199888190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199888190 is a deficient number, since it is larger than the sum of its proper divisors (159910570).

199888190 is a wasteful number, since it uses less digits than its factorization.

199888190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19988826.

The product of its (nonzero) digits is 373248, while the sum is 53.

The square root of 199888190 is about 14138.1819906238. The cubic root of 199888190 is about 584.6945491871.

The spelling of 199888190 in words is "one hundred ninety-nine million, eight hundred eighty-eight thousand, one hundred ninety".