199472438 has 16 divisors (see below), whose sum is σ = 327131136. Its totient is φ = 90468840.

The previous prime is 199472387. The next prime is 199472447. The reversal of 199472438 is 834274991.

It is a junction number, because it is equal to n+sod(n) for n = 199472392 and 199472401.

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 7 ways as a sum of consecutive naturals, for example, 395 + ... + 19977.

It is an arithmetic number, because the mean of its divisors is an integer number (20445696).

Almost surely, 2^199472438 is an apocalyptic number.

199472438 is a deficient number, since it is larger than the sum of its proper divisors (127658698).

199472438 is a wasteful number, since it uses less digits than its factorization.

199472438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20059.

The product of its digits is 435456, while the sum is 47.

The square root of 199472438 is about 14123.4711739006. The cubic root of 199472438 is about 584.2888946427.

The spelling of 199472438 in words is "one hundred ninety-nine million, four hundred seventy-two thousand, four hundred thirty-eight".