813641228 has 24 divisors (see below), whose sum is σ = 1459956960. Its totient is φ = 396529280.

The previous prime is 813641209. The next prime is 813641243. The reversal of 813641228 is 822146318.

813641228 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 278825 + ... + 281727.

It is an arithmetic number, because the mean of its divisors is an integer number (60831540).

Almost surely, 2^813641228 is an apocalyptic number.

It is an amenable number.

813641228 is a deficient number, since it is larger than the sum of its proper divisors (646315732).

813641228 is a wasteful number, since it uses less digits than its factorization.

813641228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4657 (or 4655 counting only the distinct ones).

The product of its digits is 18432, while the sum is 35.

The square root of 813641228 is about 28524.3970663711. The cubic root of 813641228 is about 933.5644716092.

The spelling of 813641228 in words is "eight hundred thirteen million, six hundred forty-one thousand, two hundred twenty-eight".