199056806 has 16 divisors (see below), whose sum is σ = 338478000. Its totient is φ = 87036768.

The previous prime is 199056773. The next prime is 199056829. The reversal of 199056806 is 608650991.

It is a super-2 number, since 2×199056806² = 79247224029843272, which contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200981 + ... + 201968.

It is an arithmetic number, because the mean of its divisors is an integer number (21154875).

Almost surely, 2^199056806 is an apocalyptic number.

199056806 is a deficient number, since it is larger than the sum of its proper divisors (139421194).

199056806 is a wasteful number, since it uses less digits than its factorization.

199056806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402983.

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 199056806 is about 14108.7492712855. The cubic root of 199056806 is about 583.8827933767.

The spelling of 199056806 in words is "one hundred ninety-nine million, fifty-six thousand, eight hundred six".