817628 has 12 divisors (see below), whose sum is σ = 1635312. Its totient is φ = 350400.

The previous prime is 817603. The next prime is 817637. The reversal of 817628 is 826718.

817628 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 817594 and 817603.

It is a congruent number.

It is an unprimeable number.

817628 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 in 3 ways as a sum of consecutive naturals, for example, 14573 + ... + 14628.

It is an arithmetic number, because the mean of its divisors is an integer number (136276).

2⁸¹⁷⁶²⁸ is an apocalyptic number.

It is an amenable number.

817628 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.

817628 is a wasteful number, since it uses less digits than its factorization.

817628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29212 (or 29210 counting only the distinct ones).

The product of its digits is 5376, while the sum is 32.

The square root of 817628 is about 904.2278473925. The cubic root of 817628 is about 93.5086783103.

The spelling of 817628 in words is "eight hundred seventeen thousand, six hundred twenty-eight".