199235138 has 24 divisors (see below), whose sum is σ = 319781196. Its totient is φ = 92774400.

The previous prime is 199235137. The next prime is 199235161. The reversal of 199235138 is 831532991.

It can be written as a sum of positive squares in 2 ways, for example, as 157076089 + 42159049 = 12533^2 + 6493^2 .

It is a junction number, because it is equal to n+sod(n) for n = 199235095 and 199235104.

It is not an unprimeable number, because it can be changed into a prime (199235137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 775106 + ... + 775362.

Almost surely, 2^199235138 is an apocalyptic number.

199235138 is a deficient number, since it is larger than the sum of its proper divisors (120546058).

199235138 is a wasteful number, since it uses less digits than its factorization.

199235138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578 (or 427 counting only the distinct ones).

The product of its digits is 58320, while the sum is 41.

The square root of 199235138 is about 14115.0677646266. The cubic root of 199235138 is about 584.0571052716.

The spelling of 199235138 in words is "one hundred ninety-nine million, two hundred thirty-five thousand, one hundred thirty-eight".