520522420 has 24 divisors (see below), whose sum is σ = 1192470048. Its totient is φ = 189280800.

The previous prime is 520522393. The next prime is 520522427. The reversal of 520522420 is 24225025.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 520522391 and 520522400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520522427) 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, 1182786 + ... + 1183225.

It is an arithmetic number, because the mean of its divisors is an integer number (49686252).

Almost surely, 2^520522420 is an apocalyptic number.

It is an amenable number.

520522420 is an abundant number, since it is smaller than the sum of its proper divisors (671947628).

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

520522420 is a wasteful number, since it uses less digits than its factorization.

520522420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2366031 (or 2366029 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 520522420 is about 22814.9604426569. The cubic root of 520522420 is about 804.4143574249.

Adding to 520522420 its reverse (24225025), we get a palindrome (544747445).

The spelling of 520522420 in words is "five hundred twenty million, five hundred twenty-two thousand, four hundred twenty".