815228 has 6 divisors (see below), whose sum is σ = 1426656. Its totient is φ = 407612.

The previous prime is 815209. The next prime is 815231. The reversal of 815228 is 822518.

815228 is nontrivially palindromic in base 16.

815228 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 815197 and 815206.

It is a congruent number.

It is an unprimeable number.

815228 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101900 + ... + 101907.

It is an arithmetic number, because the mean of its divisors is an integer number (237776).

2⁸¹⁵²²⁸ is an apocalyptic number.

It is an amenable number.

815228 is a deficient number, since it is larger than the sum of its proper divisors (611428).

815228 is a wasteful number, since it uses less digits than its factorization.

815228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203811 (or 203809 counting only the distinct ones).

The product of its digits is 1280, while the sum is 26.

The square root of 815228 is about 902.8997729538. The cubic root of 815228 is about 93.4170960059.

The spelling of 815228 in words is "eight hundred fifteen thousand, two hundred twenty-eight".