520542720 has 320 divisors, whose sum is σ = 1962195840. Its totient is φ = 130351104.

The previous prime is 520542713. The next prime is 520542727. The reversal of 520542720 is 27245025.

520542720 is a `hidden beast` number, since 52 + 0 + 542 + 72 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (520542713) and next prime (520542727).

It is a tau number, because it is divible by the number of its divisors (320).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (520542727) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1174819 + ... + 1175261.

It is an arithmetic number, because the mean of its divisors is an integer number (6131862).

Almost surely, 2^520542720 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 520542720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (981097920).

520542720 is an abundant number, since it is smaller than the sum of its proper divisors (1441653120).

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

520542720 is a wasteful number, since it uses less digits than its factorization.

520542720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492 (or 470 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 520542720 is about 22815.4053218434. The cubic root of 520542720 is about 804.4248144828.

Adding to 520542720 its reverse (27245025), we get a palindrome (547787745).

The spelling of 520542720 in words is "five hundred twenty million, five hundred forty-two thousand, seven hundred twenty".