828085 has 4 divisors (see below), whose sum is σ = 993708. Its totient is φ = 662464.

The previous prime is 828071. The next prime is 828101. The reversal of 828085 is 580828.

828085 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 576081 + 252004 = 759^2 + 502^2 .

It is a cyclic number.

It is not a de Polignac number, because 828085 - 2¹¹ = 826037 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

828085 is a lucky number.

It is a plaindrome in base 14 and base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82804 + ... + 82813.

It is an arithmetic number, because the mean of its divisors is an integer number (248427).

2⁸²⁸⁰⁸⁵ is an apocalyptic number.

It is an amenable number.

828085 is a deficient number, since it is larger than the sum of its proper divisors (165623).

828085 is a wasteful number, since it uses less digits than its factorization.

828085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165622.

The product of its (nonzero) digits is 5120, while the sum is 31.

The square root of 828085 is about 909.9917582044. The cubic root of 828085 is about 93.9056318671.

The spelling of 828085 in words is "eight hundred twenty-eight thousand, eighty-five".