813638226 has 16 divisors (see below), whose sum is σ = 1635798528. Its totient is φ = 269792400.

The previous prime is 813638201. The next prime is 813638227. The reversal of 813638226 is 622836318.

It is not an unprimeable number, because it can be changed into a prime (813638227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 353845 + ... + 356136.

It is an arithmetic number, because the mean of its divisors is an integer number (102237408).

Almost surely, 2^813638226 is an apocalyptic number.

813638226 is an abundant number, since it is smaller than the sum of its proper divisors (822160302).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

813638226 is a wasteful number, since it uses less digits than its factorization.

813638226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710177.

The product of its digits is 82944, while the sum is 39.

The square root of 813638226 is about 28524.3444447020. The cubic root of 813638226 is about 933.5633234520.

The spelling of 813638226 in words is "eight hundred thirteen million, six hundred thirty-eight thousand, two hundred twenty-six".