199374638 has 16 divisors (see below), whose sum is σ = 316411920. Its totient is φ = 93957696.

The previous prime is 199374631. The next prime is 199374653. The reversal of 199374638 is 836473991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199374631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5831 + ... + 20802.

It is an arithmetic number, because the mean of its divisors is an integer number (19775745).

Almost surely, 2^199374638 is an apocalyptic number.

199374638 is a deficient number, since it is larger than the sum of its proper divisors (117037282).

199374638 is a wasteful number, since it uses less digits than its factorization.

199374638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26851.

The product of its digits is 979776, while the sum is 50.

The square root of 199374638 is about 14120.0084277595. The cubic root of 199374638 is about 584.1933880554.

The spelling of 199374638 in words is "one hundred ninety-nine million, three hundred seventy-four thousand, six hundred thirty-eight".