505280 has 28 divisors (see below), whose sum is σ = 1203960. Its totient is φ = 201984.

The previous prime is 505279. The next prime is 505283. The reversal of 505280 is 82505.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 470 + ... + 1109.

2⁵⁰⁵²⁸⁰ is an apocalyptic number.

It is an amenable number.

505280 is an abundant number, since it is smaller than the sum of its proper divisors (698680).

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

505280 is a wasteful number, since it uses less digits than its factorization.

505280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1596 (or 1586 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 505280 is about 710.8305001897. The cubic root of 505280 is about 79.6484574860.

Adding to 505280 its reverse (82505), we get a palindrome (587785).

The spelling of 505280 in words is "five hundred five thousand, two hundred eighty".