873820 has 12 divisors (see below), whose sum is σ = 1835064. Its totient is φ = 349520.

The previous prime is 873787. The next prime is 873863. The reversal of 873820 is 28378.

It is a happy number.

It is a super-2 number, since 2×873820² = 1527122784800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 21826 + ... + 21865.

It is an arithmetic number, because the mean of its divisors is an integer number (152922).

2⁸⁷³⁸²⁰ is an apocalyptic number.

It is an amenable number.

873820 is an abundant number, since it is smaller than the sum of its proper divisors (961244).

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

873820 is a wasteful number, since it uses less digits than its factorization.

873820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43700 (or 43698 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 873820 is about 934.7833973707. The cubic root of 873820 is about 95.6035443910.

The spelling of 873820 in words is "eight hundred seventy-three thousand, eight hundred twenty".