502405640 has 64 divisors (see below), whose sum is σ = 1248125760. Its totient is φ = 180478720.

The previous prime is 502405633. The next prime is 502405643. The reversal of 502405640 is 46504205.

It is a super-2 number, since 2×502405640² = 504822854207619200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (502405643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29642 + ... + 43398.

It is an arithmetic number, because the mean of its divisors is an integer number (19501965).

Almost surely, 2^502405640 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 502405640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (624062880).

502405640 is an abundant number, since it is smaller than the sum of its proper divisors (745720120).

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

502405640 is a wasteful number, since it uses less digits than its factorization.

502405640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13862 (or 13858 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 502405640 is about 22414.4069740870. The cubic root of 502405640 is about 794.9713951445.

Adding to 502405640 its reverse (46504205), we get a palindrome (548909845).

The spelling of 502405640 in words is "five hundred two million, four hundred five thousand, six hundred forty".