503504040 has 128 divisors (see below), whose sum is σ = 1697552640. Its totient is φ = 118542336.

The previous prime is 503504039. The next prime is 503504041. The reversal of 503504040 is 40405305.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (503504039) and next prime (503504041).

It is a junction number, because it is equal to n+sod(n) for n = 503503998 and 503504016.

It is not an unprimeable number, because it can be changed into a prime (503504041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28864 + ... + 42896.

It is an arithmetic number, because the mean of its divisors is an integer number (13262130).

Almost surely, 2^503504040 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 503504040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (848776320).

503504040 is an abundant number, since it is smaller than the sum of its proper divisors (1194048600).

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

503504040 is a wasteful number, since it uses less digits than its factorization.

503504040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14083 (or 14079 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 503504040 is about 22438.8956947529. The cubic root of 503504040 is about 795.5503171228.

Adding to 503504040 its reverse (40405305), we get a palindrome (543909345).

The spelling of 503504040 in words is "five hundred three million, five hundred four thousand, forty".