520022730 has 32 divisors (see below), whose sum is σ = 1252713600. Its totient is φ = 138155072.

The previous prime is 520022689. The next prime is 520022731. The reversal of 520022730 is 37220025.

It is a junction number, because it is equal to n+sod(n) for n = 520022697 and 520022706.

It is not an unprimeable number, because it can be changed into a prime (520022731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24150 + ... + 40289.

It is an arithmetic number, because the mean of its divisors is an integer number (39147300).

Almost surely, 2^520022730 is an apocalyptic number.

520022730 is an abundant number, since it is smaller than the sum of its proper divisors (732690870).

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

520022730 is a wasteful number, since it uses less digits than its factorization.

520022730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64718.

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 520022730 is about 22804.0068847560. The cubic root of 520022730 is about 804.1568683543.

Adding to 520022730 its reverse (37220025), we get a palindrome (557242755).

The spelling of 520022730 in words is "five hundred twenty million, twenty-two thousand, seven hundred thirty".