828605 has 4 divisors (see below), whose sum is σ = 994332. Its totient is φ = 662880.

The previous prime is 828601. The next prime is 828637. The reversal of 828605 is 506828.

It is a happy number.

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 432964 + 395641 = 658^2 + 629^2 .

It is not a de Polignac number, because 828605 - 2² = 828601 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (828601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82856 + ... + 82865.

It is an arithmetic number, because the mean of its divisors is an integer number (248583).

2⁸²⁸⁶⁰⁵ is an apocalyptic number.

It is an amenable number.

828605 is a deficient number, since it is larger than the sum of its proper divisors (165727).

828605 is a wasteful number, since it uses less digits than its factorization.

828605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165726.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 828605 is about 910.2774302376. The cubic root of 828605 is about 93.9252839201.

The spelling of 828605 in words is "eight hundred twenty-eight thousand, six hundred five".