805390 has 16 divisors (see below), whose sum is σ = 1484208. Its totient is φ = 314496.

The previous prime is 805381. The next prime is 805397. The reversal of 805390 is 93508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 507 + ... + 1366.

It is an arithmetic number, because the mean of its divisors is an integer number (92763).

2⁸⁰⁵³⁹⁰ is an apocalyptic number.

805390 is a deficient number, since it is larger than the sum of its proper divisors (678818).

805390 is a wasteful number, since it uses less digits than its factorization.

805390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1923.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 805390 is about 897.4352344320. The cubic root of 805390 is about 93.0397948936.

Adding to 805390 its reverse (93508), we get a palindrome (898898).

The spelling of 805390 in words is "eight hundred five thousand, three hundred ninety".