805400 has 24 divisors (see below), whose sum is σ = 1873020. Its totient is φ = 322080.

The previous prime is 805397. The next prime is 805403. The reversal of 805400 is 4508.

It is an interprime number because it is at equal distance from previous prime (805397) and next prime (805403).

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805403) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 1814 + ... + 2213.

2⁸⁰⁵⁴⁰⁰ is an apocalyptic number.

It is an amenable number.

805400 is an abundant number, since it is smaller than the sum of its proper divisors (1067620).

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

805400 is a wasteful number, since it uses less digits than its factorization.

805400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4043 (or 4034 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 805400 is about 897.4408058474. The cubic root of 805400 is about 93.0401799634.

Adding to 805400 its reverse (4508), we get a palindrome (809908).

The spelling of 805400 in words is "eight hundred five thousand, four hundred".