503240420 has 12 divisors (see below), whose sum is σ = 1056804924. Its totient is φ = 201296160.

The previous prime is 503240411. The next prime is 503240429. The reversal of 503240420 is 24042305.

It is an interprime number because it is at equal distance from previous prime (503240411) and next prime (503240429).

It can be written as a sum of positive squares in 2 ways, for example, as 176570944 + 326669476 = 13288^2 + 18074^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 25162021 = 503240420 / (5 + 0 + 3 + 2 + 4 + 0 + 4 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 503240392 and 503240401.

It is not an unprimeable number, because it can be changed into a prime (503240429) 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, 12580991 + ... + 12581030.

It is an arithmetic number, because the mean of its divisors is an integer number (88067077).

Almost surely, 2^503240420 is an apocalyptic number.

It is an amenable number.

503240420 is an abundant number, since it is smaller than the sum of its proper divisors (553564504).

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

503240420 is a wasteful number, since it uses less digits than its factorization.

503240420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25162030 (or 25162028 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 503240420 is about 22433.0207506702. The cubic root of 503240420 is about 795.4114505860.

Adding to 503240420 its reverse (24042305), we get a palindrome (527282725).

The spelling of 503240420 in words is "five hundred three million, two hundred forty thousand, four hundred twenty".