917228 has 24 divisors (see below), whose sum is σ = 1787520. Its totient is φ = 408960.

The previous prime is 917227. The next prime is 917237. The reversal of 917228 is 822719.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 917228.

It is not an unprimeable number, because it can be changed into a prime (917227) 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, 1328 + ... + 1896.

It is an arithmetic number, because the mean of its divisors is an integer number (74480).

2⁹¹⁷²²⁸ is an apocalyptic number.

It is an amenable number.

917228 is a deficient number, since it is larger than the sum of its proper divisors (870292).

917228 is a wasteful number, since it uses less digits than its factorization.

917228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617 (or 615 counting only the distinct ones).

The product of its digits is 2016, while the sum is 29.

The square root of 917228 is about 957.7202096646. The cubic root of 917228 is about 97.1611026036.

The spelling of 917228 in words is "nine hundred seventeen thousand, two hundred twenty-eight".