805140 has 120 divisors (see below), whose sum is σ = 2927232. Its totient is φ = 181440.

The previous prime is 805121. The next prime is 805153. The reversal of 805140 is 41508.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 11305 + ... + 11375.

2⁸⁰⁵¹⁴⁰ 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 805140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1463616).

805140 is an abundant number, since it is smaller than the sum of its proper divisors (2122092).

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

805140 is a wasteful number, since it uses less digits than its factorization.

805140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 805140 is about 897.2959378042. The cubic root of 805140 is about 93.0301671125.

Adding to 805140 its reverse (41508), we get a palindrome (846648).

The spelling of 805140 in words is "eight hundred five thousand, one hundred forty".