523620 has 36 divisors (see below), whose sum is σ = 1588860. Its totient is φ = 139584.

The previous prime is 523603. The next prime is 523631. The reversal of 523620 is 26325.

It can be written as a sum of positive squares in 2 ways, for example, as 331776 + 191844 = 576^2 + 438^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 523593 and 523602.

It is an unprimeable number.

523620 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1275 + ... + 1634.

It is an arithmetic number, because the mean of its divisors is an integer number (44135).

2⁵²³⁶²⁰ is an apocalyptic number.

It is an amenable number.

523620 is an abundant number, since it is smaller than the sum of its proper divisors (1065240).

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

523620 is a wasteful number, since it uses less digits than its factorization.

523620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2924 (or 2919 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 523620 is about 723.6159202229. The cubic root of 523620 is about 80.6006867377.

Adding to 523620 its reverse (26325), we get a palindrome (549945).

The spelling of 523620 in words is "five hundred twenty-three thousand, six hundred twenty".