820884 has 24 divisors (see below), whose sum is σ = 1945888. Its totient is φ = 269280.

The previous prime is 820873. The next prime is 820891. The reversal of 820884 is 488028.

It is a plaindrome in base 15.

It is a congruent number.

It is an unprimeable number.

820884 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 294 + ... + 1314.

2⁸²⁰⁸⁸⁴ is an apocalyptic number.

It is an amenable number.

820884 is an abundant number, since it is smaller than the sum of its proper divisors (1125004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

820884 is a wasteful number, since it uses less digits than its factorization.

820884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095 (or 1093 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 30.

The square root of 820884 is about 906.0264896790. The cubic root of 820884 is about 93.6326389204.

The spelling of 820884 in words is "eight hundred twenty thousand, eight hundred eighty-four".