828769 has 4 divisors (see below), whose sum is σ = 840196. Its totient is φ = 817344.

The previous prime is 828757. The next prime is 828787. The reversal of 828769 is 967828.

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 345744 + 483025 = 588^2 + 695^2 .

It is a cyclic number.

It is not a de Polignac number, because 828769 - 2¹³ = 820577 is a prime.

It is a super-2 number, since 2×828769² = 1373716110722, which contains 22 as substring.

It is a Duffinian number.

828769 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (828169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5604 + ... + 5749.

It is an arithmetic number, because the mean of its divisors is an integer number (210049).

2⁸²⁸⁷⁶⁹ is an apocalyptic number.

It is an amenable number.

828769 is a deficient number, since it is larger than the sum of its proper divisors (11427).

828769 is a wasteful number, since it uses less digits than its factorization.

828769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11426.

The product of its digits is 48384, while the sum is 40.

The square root of 828769 is about 910.3675082075. The cubic root of 828769 is about 93.9314801698.

The spelling of 828769 in words is "eight hundred twenty-eight thousand, seven hundred sixty-nine".