828173285 has 8 divisors (see below), whose sum is σ = 994438296. Its totient is φ = 662118400.

The previous prime is 828173279. The next prime is 828173299. The reversal of 828173285 is 582371828.

It is a Cunningham number, because it is equal to 28778²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 259016836 + 569156449 = 16094^2 + 23857^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 828173285 - 2⁶ = 828173221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43724 + ... + 59733.

It is an arithmetic number, because the mean of its divisors is an integer number (124304787).

Almost surely, 2^828173285 is an apocalyptic number.

It is an amenable number.

828173285 is a deficient number, since it is larger than the sum of its proper divisors (166265011).

828173285 is a wasteful number, since it uses less digits than its factorization.

828173285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105063.

The product of its digits is 215040, while the sum is 44.

The square root of 828173285 is about 28778.0000173744. Note that the first 4 decimals coincide. The cubic root of 828173285 is about 939.0896894969.

The spelling of 828173285 in words is "eight hundred twenty-eight million, one hundred seventy-three thousand, two hundred eighty-five".