503640340 has 48 divisors (see below), whose sum is σ = 1226800512. Its totient is φ = 170096256.

The previous prime is 503640323. The next prime is 503640349. The reversal of 503640340 is 43046305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (503640349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17467 + ... + 36226.

It is an arithmetic number, because the mean of its divisors is an integer number (25558344).

Almost surely, 2^503640340 is an apocalyptic number.

It is an amenable number.

503640340 is an abundant number, since it is smaller than the sum of its proper divisors (723160172).

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

503640340 is a wasteful number, since it uses less digits than its factorization.

503640340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53776 (or 53774 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 503640340 is about 22441.9326262245. The cubic root of 503640340 is about 795.6220965702.

Adding to 503640340 its reverse (43046305), we get a palindrome (546686645).

The spelling of 503640340 in words is "five hundred three million, six hundred forty thousand, three hundred forty".