503430504440 has 128 divisors (see below), whose sum is σ = 1168821688320. Its totient is φ = 195084288000.

The previous prime is 503430504419. The next prime is 503430504457. The reversal of 503430504440 is 44405034305.

It is a junction number, because it is equal to n+sod(n) for n = 503430504397 and 503430504406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37448120 + ... + 37461560.

It is an arithmetic number, because the mean of its divisors is an integer number (9131419440).

Almost surely, 2^503430504440 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 503430504440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (584410844160).

503430504440 is an abundant number, since it is smaller than the sum of its proper divisors (665391183880).

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

503430504440 is a wasteful number, since it uses less digits than its factorization.

503430504440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13753 (or 13749 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 32.

Adding to 503430504440 its reverse (44405034305), we get a palindrome (547835538745).

The spelling of 503430504440 in words is "five hundred three billion, four hundred thirty million, five hundred four thousand, four hundred forty".