199438856 has 16 divisors (see below), whose sum is σ = 374101200. Its totient is φ = 99678544.

The previous prime is 199438807. The next prime is 199438861. The reversal of 199438856 is 658834991.

It is a junction number, because it is equal to n+sod(n) for n = 199438798 and 199438807.

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, 29051 + ... + 35253.

It is an arithmetic number, because the mean of its divisors is an integer number (23381325).

Almost surely, 2^199438856 is an apocalyptic number.

It is an amenable number.

199438856 is a deficient number, since it is larger than the sum of its proper divisors (174662344).

199438856 is a wasteful number, since it uses less digits than its factorization.

199438856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10228 (or 10224 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 53.

The square root of 199438856 is about 14122.2822518175. The cubic root of 199438856 is about 584.2561036615.

The spelling of 199438856 in words is "one hundred ninety-nine million, four hundred thirty-eight thousand, eight hundred fifty-six".