199365738 has 64 divisors (see below), whose sum is σ = 470558592. Its totient is φ = 55514880.

The previous prime is 199365737. The next prime is 199365767. The reversal of 199365738 is 837563991.

It is not an unprimeable number, because it can be changed into a prime (199365737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 271620 + ... + 272352.

It is an arithmetic number, because the mean of its divisors is an integer number (7352478).

Almost surely, 2^199365738 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 199365738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235279296).

199365738 is an abundant number, since it is smaller than the sum of its proper divisors (271192854).

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

199365738 is a wasteful number, since it uses less digits than its factorization.

199365738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1079.

The product of its digits is 1224720, while the sum is 51.

The square root of 199365738 is about 14119.6932686231. The cubic root of 199365738 is about 584.1846952103.

The spelling of 199365738 in words is "one hundred ninety-nine million, three hundred sixty-five thousand, seven hundred thirty-eight".