828669 has 8 divisors (see below), whose sum is σ = 1109952. Its totient is φ = 549920.

The previous prime is 828649. The next prime is 828673. The reversal of 828669 is 966828.

828669 = 206² + 207² + ... + 223².

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

It is a cyclic number.

It is not a de Polignac number, because 828669 - 2⁵ = 828637 is a prime.

It is a super-2 number, since 2×828669² = 1373384623122, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (828649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 352 + ... + 1334.

It is an arithmetic number, because the mean of its divisors is an integer number (138744).

2⁸²⁸⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

828669 is a deficient number, since it is larger than the sum of its proper divisors (281283).

828669 is a wasteful number, since it uses less digits than its factorization.

828669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267.

The product of its digits is 41472, while the sum is 39.

The square root of 828669 is about 910.3125836766. The cubic root of 828669 is about 93.9277020660.

The spelling of 828669 in words is "eight hundred twenty-eight thousand, six hundred sixty-nine".