822628 has 6 divisors (see below), whose sum is σ = 1439606. Its totient is φ = 411312.

The previous prime is 822611. The next prime is 822631. The reversal of 822628 is 826228.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 627264 + 195364 = 792^2 + 442^2 .

It is a nialpdrome in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 822596 and 822605.

It is an unprimeable number.

822628 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, 102825 + ... + 102832.

2⁸²²⁶²⁸ is an apocalyptic number.

It is an amenable number.

822628 is a deficient number, since it is larger than the sum of its proper divisors (616978).

822628 is a wasteful number, since it uses less digits than its factorization.

822628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205661 (or 205659 counting only the distinct ones).

The product of its digits is 3072, while the sum is 28.

The square root of 822628 is about 906.9884232999. The cubic root of 822628 is about 93.6989007456.

Subtracting 822628 from its reverse (826228), we obtain a square (3600 = 60²).

It can be divided in two parts, 82 and 2628, that multiplied together give a triangular number (215496 = T₆₅₆).

The spelling of 822628 in words is "eight hundred twenty-two thousand, six hundred twenty-eight".