190109200 has 30 divisors (see below), whose sum is σ = 456738314. Its totient is φ = 76043520.

The previous prime is 190109197. The next prime is 190109201. The reversal of 190109200 is 2901091.

It can be written as a sum of positive squares in 3 ways, for example, as 256 + 190108944 = 16^2 + 13788^2 .

It is a super-2 number, since 2×190109200² = 72283015849280000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (190109201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 237237 + ... + 238036.

Almost surely, 2^190109200 is an apocalyptic number.

190109200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

190109200 is an abundant number, since it is smaller than the sum of its proper divisors (266629114).

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

190109200 is a wasteful number, since it uses less digits than its factorization.

190109200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475291 (or 475280 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 190109200 is about 13788.0092834317. The cubic root of 190109200 is about 574.9998235664. Note that the first 3 decimals are identical.

The spelling of 190109200 in words is "one hundred ninety million, one hundred nine thousand, two hundred".