809140 has 24 divisors (see below), whose sum is σ = 1774080. Its totient is φ = 309408.

The previous prime is 809101. The next prime is 809141. The reversal of 809140 is 41908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809141) by changing a digit.

809140 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, 420 + ... + 1339.

It is an arithmetic number, because the mean of its divisors is an integer number (73920).

2⁸⁰⁹¹⁴⁰ is an apocalyptic number.

It is an amenable number.

809140 is an abundant number, since it is smaller than the sum of its proper divisors (964940).

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

809140 is a wasteful number, since it uses less digits than its factorization.

809140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1791 (or 1789 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 809140 is about 899.5220953373. The cubic root of 809140 is about 93.1839731263.

It can be divided in two parts, 809 and 140, that added together give a palindrome (949).

The spelling of 809140 in words is "eight hundred nine thousand, one hundred forty".