506390 has 16 divisors (see below), whose sum is σ = 924480. Its totient is φ = 199680.

The previous prime is 506381. The next prime is 506393. The reversal of 506390 is 93605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (506393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 470 + ... + 1110.

It is an arithmetic number, because the mean of its divisors is an integer number (57780).

2⁵⁰⁶³⁹⁰ is an apocalyptic number.

506390 is a deficient number, since it is larger than the sum of its proper divisors (418090).

506390 is a wasteful number, since it uses less digits than its factorization.

506390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727.

The product of its (nonzero) digits is 810, while the sum is 23.

The square root of 506390 is about 711.6108487088. The cubic root of 506390 is about 79.7067387869.

Adding to 506390 its reverse (93605), we get a palindrome (599995).

The spelling of 506390 in words is "five hundred six thousand, three hundred ninety".