523920 has 80 divisors (see below), whose sum is σ = 1696320. Its totient is φ = 133632.

The previous prime is 523907. The next prime is 523927. The reversal of 523920 is 29325.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523927) by changing a digit.

523920 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8851 + ... + 8909.

It is an arithmetic number, because the mean of its divisors is an integer number (21204).

2⁵²³⁹²⁰ 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 523920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (848160).

523920 is an abundant number, since it is smaller than the sum of its proper divisors (1172400).

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

523920 is a wasteful number, since it uses less digits than its factorization.

523920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112 (or 106 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 523920 is about 723.8231828285. The cubic root of 523920 is about 80.6160767722.

The spelling of 523920 in words is "five hundred twenty-three thousand, nine hundred twenty".