199408438 has 8 divisors (see below), whose sum is σ = 299268432. Its totient is φ = 99652296.

The previous prime is 199408421. The next prime is 199408457. The reversal of 199408438 is 834804991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20970 + ... + 28957.

It is an arithmetic number, because the mean of its divisors is an integer number (37408554).

Almost surely, 2^199408438 is an apocalyptic number.

199408438 is a deficient number, since it is larger than the sum of its proper divisors (99859994).

199408438 is a wasteful number, since it uses less digits than its factorization.

199408438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51926.

The product of its (nonzero) digits is 248832, while the sum is 46.

The square root of 199408438 is about 14121.2052601752. The cubic root of 199408438 is about 584.2263989755.

The spelling of 199408438 in words is "one hundred ninety-nine million, four hundred eight thousand, four hundred thirty-eight".