503240040 has 160 divisors (see below), whose sum is σ = 1706158080. Its totient is φ = 133031808.

The previous prime is 503240021. The next prime is 503240041. The reversal of 503240040 is 40042305.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 503239995 and 503240022.

It is not an unprimeable number, because it can be changed into a prime (503240041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 410869 + ... + 412091.

It is an arithmetic number, because the mean of its divisors is an integer number (10663488).

Almost surely, 2^503240040 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 503240040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (853079040).

503240040 is an abundant number, since it is smaller than the sum of its proper divisors (1202918040).

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

503240040 is a wasteful number, since it uses less digits than its factorization.

503240040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1373 (or 1360 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 503240040 is about 22433.0122810112. The cubic root of 503240040 is about 795.4112503793.

Adding to 503240040 its reverse (40042305), we get a palindrome (543282345).

The spelling of 503240040 in words is "five hundred three million, two hundred forty thousand, forty".