199628642 has 8 divisors (see below), whose sum is σ = 299603676. Its totient is φ = 99760752.

The previous prime is 199628629. The next prime is 199628657. The reversal of 199628642 is 246826991.

199628642 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 14129²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 199628641 + 1 = 14129^2 + 1^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 21953 + ... + 29684.

Almost surely, 2^199628642 is an apocalyptic number.

199628642 is a deficient number, since it is larger than the sum of its proper divisors (99975034).

199628642 is a wasteful number, since it uses less digits than its factorization.

199628642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53572.

The product of its digits is 373248, while the sum is 47.

The square root of 199628642 is about 14129.0000353882. Note that the first 4 decimals coincide. The cubic root of 199628642 is about 584.4413709282.

The spelling of 199628642 in words is "one hundred ninety-nine million, six hundred twenty-eight thousand, six hundred forty-two".