199866456 has 48 divisors (see below), whose sum is σ = 542341800. Its totient is φ = 66494592.

The previous prime is 199866449. The next prime is 199866461. The reversal of 199866456 is 654668991.

It is a happy number.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39900 + ... + 44628.

Almost surely, 2^199866456 is an apocalyptic number.

It is an amenable number.

199866456 is an abundant number, since it is smaller than the sum of its proper divisors (342475344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

199866456 is a wasteful number, since it uses less digits than its factorization.

199866456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5328 (or 5321 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 54.

The square root of 199866456 is about 14137.4133419095. The cubic root of 199866456 is about 584.6733569864.

The spelling of 199866456 in words is "one hundred ninety-nine million, eight hundred sixty-six thousand, four hundred fifty-six".