523800240 has 80 divisors (see below), whose sum is σ = 1631228928. Its totient is φ = 139039488.

The previous prime is 523800239. The next prime is 523800253. The reversal of 523800240 is 42008325.

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

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 523800240.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48627 + ... + 58413.

Almost surely, 2^523800240 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 523800240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (815614464).

523800240 is an abundant number, since it is smaller than the sum of its proper divisors (1107428688).

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

523800240 is a wasteful number, since it uses less digits than its factorization.

523800240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10026 (or 10020 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 523800240 is about 22886.6825905372. The cubic root of 523800240 is about 806.0993377513.

Adding to 523800240 its reverse (42008325), we get a palindrome (565808565).

The spelling of 523800240 in words is "five hundred twenty-three million, eight hundred thousand, two hundred forty".