503105240 has 64 divisors (see below), whose sum is σ = 1247231520. Its totient is φ = 181120000.

The previous prime is 503105227. The next prime is 503105257. The reversal of 503105240 is 42501305.

503105240 = 5600² + 5601² + ... + 5615².

It is a super-2 number, since 2×503105240² = 506229765030915200, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38780 + ... + 50100.

Almost surely, 2^503105240 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 503105240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (623615760).

503105240 is an abundant number, since it is smaller than the sum of its proper divisors (744126280).

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

503105240 is a wasteful number, since it uses less digits than its factorization.

503105240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11444 (or 11440 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 503105240 is about 22430.0075791338. The cubic root of 503105240 is about 795.3402232994.

Adding to 503105240 its reverse (42501305), we get a palindrome (545606545).

The spelling of 503105240 in words is "five hundred three million, one hundred five thousand, two hundred forty".