502721040 has 80 divisors (see below), whose sum is σ = 1577274048. Its totient is φ = 132438528.

The previous prime is 502721029. The next prime is 502721053. The reversal of 502721040 is 40127205.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 502720998 and 502721016.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7302 + ... + 32538.

Almost surely, 2^502721040 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 502721040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (788637024).

502721040 is an abundant number, since it is smaller than the sum of its proper divisors (1074553008).

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

502721040 is a wasteful number, since it uses less digits than its factorization.

502721040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25336 (or 25330 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 502721040 is about 22421.4415236844. The cubic root of 502721040 is about 795.1377159470.

Adding to 502721040 its reverse (40127205), we get a palindrome (542848245).

The spelling of 502721040 in words is "five hundred two million, seven hundred twenty-one thousand, forty".