399438194 has 8 divisors (see below), whose sum is σ = 625207680. Its totient is φ = 191035636.

The previous prime is 399438167. The next prime is 399438203. The reversal of 399438194 is 491834993.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4341674 + ... + 4341765.

It is an arithmetic number, because the mean of its divisors is an integer number (78150960).

Almost surely, 2^399438194 is an apocalyptic number.

399438194 is a deficient number, since it is larger than the sum of its proper divisors (225769486).

399438194 is a wasteful number, since it uses less digits than its factorization.

399438194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8683464.

The product of its digits is 839808, while the sum is 50.

The square root of 399438194 is about 19985.9499148777. The cubic root of 399438194 is about 736.4611862719.

The spelling of 399438194 in words is "three hundred ninety-nine million, four hundred thirty-eight thousand, one hundred ninety-four".