523280 has 40 divisors (see below), whose sum is σ = 1261824. Its totient is φ = 201600.

The previous prime is 523261. The next prime is 523297. The reversal of 523280 is 82325.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2375 + ... + 2585.

2⁵²³²⁸⁰ 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 523280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (630912).

523280 is an abundant number, since it is smaller than the sum of its proper divisors (738544).

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

523280 is a wasteful number, since it uses less digits than its factorization.

523280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255 (or 249 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 523280 is about 723.3809508136. The cubic root of 523280 is about 80.5832375907.

The spelling of 523280 in words is "five hundred twenty-three thousand, two hundred eighty".