199739438 has 16 divisors (see below), whose sum is σ = 315744000. Its totient is φ = 94503672.

The previous prime is 199739389. The next prime is 199739447. The reversal of 199739438 is 834937991.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 199739438.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36953 + ... + 42011.

It is an arithmetic number, because the mean of its divisors is an integer number (19734000).

Almost surely, 2^199739438 is an apocalyptic number.

199739438 is a deficient number, since it is larger than the sum of its proper divisors (116004562).

199739438 is a wasteful number, since it uses less digits than its factorization.

199739438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6119.

The product of its digits is 1469664, while the sum is 53.

The square root of 199739438 is about 14132.9203634635. The cubic root of 199739438 is about 584.5494746377.

The spelling of 199739438 in words is "one hundred ninety-nine million, seven hundred thirty-nine thousand, four hundred thirty-eight".