805490 has 32 divisors (see below), whose sum is σ = 1707264. Its totient is φ = 267840.

The previous prime is 805487. The next prime is 805499. The reversal of 805490 is 94508.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (805499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2435 + ... + 2745.

It is an arithmetic number, because the mean of its divisors is an integer number (53352).

2⁸⁰⁵⁴⁹⁰ is an apocalyptic number.

805490 is an abundant number, since it is smaller than the sum of its proper divisors (901774).

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

805490 is a wasteful number, since it uses less digits than its factorization.

805490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 805490 is about 897.4909470296. The cubic root of 805490 is about 93.0436454481.

Adding to 805490 its reverse (94508), we get a palindrome (899998).

The spelling of 805490 in words is "eight hundred five thousand, four hundred ninety".