199990456 has 32 divisors (see below), whose sum is σ = 387233280. Its totient is φ = 96768000.

The previous prime is 199990421. The next prime is 199990477. The reversal of 199990456 is 654099991.

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, 39256 + ... + 44056.

It is an arithmetic number, because the mean of its divisors is an integer number (12101040).

Almost surely, 2^199990456 is an apocalyptic number.

It is an amenable number.

199990456 is a deficient number, since it is larger than the sum of its proper divisors (187242824).

199990456 is a wasteful number, since it uses less digits than its factorization.

199990456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4975 (or 4971 counting only the distinct ones).

The product of its (nonzero) digits is 787320, while the sum is 52.

The square root of 199990456 is about 14141.7981883493. The cubic root of 199990456 is about 584.7942452195.

The spelling of 199990456 in words is "one hundred ninety-nine million, nine hundred ninety thousand, four hundred fifty-six".