523820720 has 20 divisors (see below), whose sum is σ = 1217883360. Its totient is φ = 209528256.

The previous prime is 523820681. The next prime is 523820723. The reversal of 523820720 is 27028325.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (523820723) 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 3 ways as a sum of consecutive naturals, for example, 3273800 + ... + 3273959.

It is an arithmetic number, because the mean of its divisors is an integer number (60894168).

Almost surely, 2^523820720 is an apocalyptic number.

It is an amenable number.

523820720 is an abundant number, since it is smaller than the sum of its proper divisors (694062640).

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

523820720 is a wasteful number, since it uses less digits than its factorization.

523820720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6547772 (or 6547766 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 523820720 is about 22887.1300079324. The cubic root of 523820720 is about 806.1098434734.

The spelling of 523820720 in words is "five hundred twenty-three million, eight hundred twenty thousand, seven hundred twenty".