808840 has 32 divisors (see below), whose sum is σ = 1851480. Its totient is φ = 317952.

The previous prime is 808837. The next prime is 808853. The reversal of 808840 is 48808.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 544644 + 264196 = 738^2 + 514^2 .

It is a junction number, because it is equal to n+sod(n) for n = 808799 and 808808.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2782 + ... + 3058.

2⁸⁰⁸⁸⁴⁰ 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 808840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (925740).

808840 is an abundant number, since it is smaller than the sum of its proper divisors (1042640).

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

808840 is a wasteful number, since it uses less digits than its factorization.

808840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361 (or 357 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 28.

The square root of 808840 is about 899.3553246632. The cubic root of 808840 is about 93.1724552812.

It can be divided in two parts, 8088 and 40, that added together give a triangular number (8128 = T₁₂₇).

The spelling of 808840 in words is "eight hundred eight thousand, eight hundred forty".