500631640 has 128 divisors (see below), whose sum is σ = 1259712000. Its totient is φ = 178167808.

The previous prime is 500631629. The next prime is 500631661. The reversal of 500631640 is 46136005.

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, 1044921 + ... + 1045399.

It is an arithmetic number, because the mean of its divisors is an integer number (9841500).

Almost surely, 2^500631640 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 500631640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (629856000).

500631640 is an abundant number, since it is smaller than the sum of its proper divisors (759080360).

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

500631640 is a wasteful number, since it uses less digits than its factorization.

500631640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589 (or 585 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 500631640 is about 22374.7992169762. The cubic root of 500631640 is about 794.0346073443.

Adding to 500631640 its reverse (46136005), we get a palindrome (546767645).

The spelling of 500631640 in words is "five hundred million, six hundred thirty-one thousand, six hundred forty".