506641220 has 24 divisors (see below), whose sum is σ = 1077417600. Its totient is φ = 200090592.

The previous prime is 506641189. The next prime is 506641229. The reversal of 506641220 is 22146605.

It is a self number, because there is not a number n which added to its sum of digits gives 506641220.

It is not an unprimeable number, because it can be changed into a prime (506641229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158750 + ... + 161909.

It is an arithmetic number, because the mean of its divisors is an integer number (44892400).

Almost surely, 2^506641220 is an apocalyptic number.

It is an amenable number.

506641220 is an abundant number, since it is smaller than the sum of its proper divisors (570776380).

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

506641220 is a wasteful number, since it uses less digits than its factorization.

506641220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320747 (or 320745 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 506641220 is about 22508.6920988315. The cubic root of 506641220 is about 797.1991744135.

Adding to 506641220 its reverse (22146605), we get a palindrome (528787825).

The spelling of 506641220 in words is "five hundred six million, six hundred forty-one thousand, two hundred twenty".