522620730 has 48 divisors (see below), whose sum is σ = 1387736064. Its totient is φ = 136399200.

The previous prime is 522620719. The next prime is 522620737. The reversal of 522620730 is 37026225.

522620730 is a `hidden beast` number, since 5 + 2 + 2 + 620 + 7 + 30 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 522620694 and 522620703.

It is not an unprimeable number, because it can be changed into a prime (522620737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57546 + ... + 66005.

It is an arithmetic number, because the mean of its divisors is an integer number (28911168).

Almost surely, 2^522620730 is an apocalyptic number.

522620730 is an abundant number, since it is smaller than the sum of its proper divisors (865115334).

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

522620730 is a wasteful number, since it uses less digits than its factorization.

522620730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123611 (or 123608 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 522620730 is about 22860.8995885989. The cubic root of 522620730 is about 805.4938163244.

Adding to 522620730 its reverse (37026225), we get a palindrome (559646955).

The spelling of 522620730 in words is "five hundred twenty-two million, six hundred twenty thousand, seven hundred thirty".