870804 has 48 divisors (see below), whose sum is σ = 2466240. Its totient is φ = 263520.

The previous prime is 870787. The next prime is 870809. The reversal of 870804 is 408078.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870809) by changing a digit.

870804 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 15 ways as a sum of consecutive naturals, for example, 822 + ... + 1554.

It is an arithmetic number, because the mean of its divisors is an integer number (51380).

2⁸⁷⁰⁸⁰⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 870804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1233120).

870804 is an abundant number, since it is smaller than the sum of its proper divisors (1595436).

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

870804 is a wasteful number, since it uses less digits than its factorization.

870804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757 (or 749 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 870804 is about 933.1687950205. The cubic root of 870804 is about 95.4934253489.

The spelling of 870804 in words is "eight hundred seventy thousand, eight hundred four".