828671 has 4 divisors (see below), whose sum is σ = 837312. Its totient is φ = 820032.

The previous prime is 828649. The next prime is 828673. The reversal of 828671 is 176828.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-828671 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 (828673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4175 + ... + 4368.

It is an arithmetic number, because the mean of its divisors is an integer number (209328).

2⁸²⁸⁶⁷¹ is an apocalyptic number.

828671 is a deficient number, since it is larger than the sum of its proper divisors (8641).

828671 is an equidigital number, since it uses as much as digits as its factorization.

828671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8640.

The product of its digits is 5376, while the sum is 32.

The square root of 828671 is about 910.3136821997. The cubic root of 828671 is about 93.9277776311.

The spelling of 828671 in words is "eight hundred twenty-eight thousand, six hundred seventy-one".