199018628 has 12 divisors (see below), whose sum is σ = 348445440. Its totient is φ = 99462792.

The previous prime is 199018627. The next prime is 199018637. The reversal of 199018628 is 826810991.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (199018621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 908 + ... + 19971.

It is an arithmetic number, because the mean of its divisors is an integer number (29037120).

Almost surely, 2^199018628 is an apocalyptic number.

It is an amenable number.

199018628 is a deficient number, since it is larger than the sum of its proper divisors (149426812).

199018628 is a wasteful number, since it uses less digits than its factorization.

199018628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23266 (or 23264 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 44.

The square root of 199018628 is about 14107.3962161697. The cubic root of 199018628 is about 583.8454624878.

The spelling of 199018628 in words is "one hundred ninety-nine million, eighteen thousand, six hundred twenty-eight".