198628827 has 4 divisors (see below), whose sum is σ = 264838440. Its totient is φ = 132419216.

The previous prime is 198628823. The next prime is 198628879. The reversal of 198628827 is 728826891.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 198628827 - 2² = 198628823 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 198628827.

It is not an unprimeable number, because it can be changed into a prime (198628823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33104802 + ... + 33104807.

It is an arithmetic number, because the mean of its divisors is an integer number (66209610).

Almost surely, 2^198628827 is an apocalyptic number.

198628827 is a deficient number, since it is larger than the sum of its proper divisors (66209613).

198628827 is an equidigital number, since it uses as much as digits as its factorization.

198628827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66209612.

The product of its digits is 774144, while the sum is 51.

The square root of 198628827 is about 14093.5739612066. The cubic root of 198628827 is about 583.4640370701.

The spelling of 198628827 in words is "one hundred ninety-eight million, six hundred twenty-eight thousand, eight hundred twenty-seven".