523421280 has 144 divisors (see below), whose sum is σ = 1804027680. Its totient is φ = 138184704.

The previous prime is 523421237. The next prime is 523421299. The reversal of 523421280 is 82124325.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 146556 + ... + 150084.

It is an arithmetic number, because the mean of its divisors is an integer number (12527970).

Almost surely, 2^523421280 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 523421280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (902013840).

523421280 is an abundant number, since it is smaller than the sum of its proper divisors (1280606400).

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

523421280 is a wasteful number, since it uses less digits than its factorization.

523421280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3653 (or 3642 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 523421280 is about 22878.4020421008. The cubic root of 523421280 is about 805.9048914205.

The spelling of 523421280 in words is "five hundred twenty-three million, four hundred twenty-one thousand, two hundred eighty".