809228 has 12 divisors (see below), whose sum is σ = 1618512. Its totient is φ = 346800.

The previous prime is 809213. The next prime is 809231. The reversal of 809228 is 822908.

809228 = 337² + 338² + ... + 343².

809228 is an admirable number.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 13.

It is a zygodrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 809228.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 809228.

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, 14423 + ... + 14478.

It is an arithmetic number, because the mean of its divisors is an integer number (134876).

2⁸⁰⁹²²⁸ is an apocalyptic number.

It is an amenable number.

809228 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

809228 is a wasteful number, since it uses less digits than its factorization.

809228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28912 (or 28910 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 809228 is about 899.5710088703. The cubic root of 809228 is about 93.1873511542.

It can be divided in two parts, 8092 and 28, that multiplied together give a square (226576 = 476²).

The spelling of 809228 in words is "eight hundred nine thousand, two hundred twenty-eight".