505390 has 8 divisors (see below), whose sum is σ = 909720. Its totient is φ = 202152.

The previous prime is 505369. The next prime is 505399. The reversal of 505390 is 93505.

505390 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505399) by changing a digit.

505390 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 3 ways as a sum of consecutive naturals, for example, 25260 + ... + 25279.

It is an arithmetic number, because the mean of its divisors is an integer number (113715).

2⁵⁰⁵³⁹⁰ is an apocalyptic number.

505390 is a deficient number, since it is larger than the sum of its proper divisors (404330).

505390 is a wasteful number, since it uses less digits than its factorization.

505390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50546.

The product of its (nonzero) digits is 675, while the sum is 22.

The square root of 505390 is about 710.9078702617. The cubic root of 505390 is about 79.6542369183.

Adding to 505390 its reverse (93505), we get a palindrome (598895).

The spelling of 505390 in words is "five hundred five thousand, three hundred ninety".