500028561 has 12 divisors (see below), whose sum is σ = 726590592. Its totient is φ = 331355256.

The previous prime is 500028559. The next prime is 500028569. The reversal of 500028561 is 165820005.

It is not a de Polignac number, because 500028561 - 2¹ = 500028559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (500028569) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 164841 + ... + 167846.

It is an arithmetic number, because the mean of its divisors is an integer number (60549216).

Almost surely, 2^500028561 is an apocalyptic number.

It is an amenable number.

500028561 is a deficient number, since it is larger than the sum of its proper divisors (226562031).

500028561 is a wasteful number, since it uses less digits than its factorization.

500028561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332860 (or 332857 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 500028561 is about 22361.3184092531. The cubic root of 500028561 is about 793.7156382835.

Adding to 500028561 its reverse (165820005), we get a palindrome (665848566).

The spelling of 500028561 in words is "five hundred million, twenty-eight thousand, five hundred sixty-one".