800440 has 16 divisors (see below), whose sum is σ = 1801080. Its totient is φ = 320160.

The previous prime is 800419. The next prime is 800441. The reversal of 800440 is 44008.

800440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

800440 is a modest number, since divided by 440 gives 80 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (800441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9966 + ... + 10045.

2⁸⁰⁰⁴⁴⁰ is an apocalyptic number.

It is an amenable number.

800440 is an abundant number, since it is smaller than the sum of its proper divisors (1000640).

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

800440 is a wasteful number, since it uses less digits than its factorization.

800440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20022 (or 20018 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 800440 is about 894.6731246662. The cubic root of 800440 is about 92.8487927121.

Adding to 800440 its reverse (44008), we get a palindrome (844448).

The spelling of 800440 in words is "eight hundred thousand, four hundred forty".