505040 has 40 divisors (see below), whose sum is σ = 1205280. Its totient is φ = 196736.

The previous prime is 505033. The next prime is 505049. The reversal of 505040 is 40505.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505049) 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, 4667 + ... + 4773.

It is an arithmetic number, because the mean of its divisors is an integer number (30132).

2⁵⁰⁵⁰⁴⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 505040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (602640).

505040 is an abundant number, since it is smaller than the sum of its proper divisors (700240).

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

505040 is a wasteful number, since it uses less digits than its factorization.

505040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 14.

The square root of 505040 is about 710.6616635221. The cubic root of 505040 is about 79.6358449034.

Adding to 505040 its reverse (40505), we get a palindrome (545545).

The spelling of 505040 in words is "five hundred five thousand, forty".