523843840 has 72 divisors (see below), whose sum is σ = 1351333368. Its totient is φ = 193413120.

The previous prime is 523843829. The next prime is 523843843. The reversal of 523843840 is 48348325.

It can be written as a sum of positive squares in 4 ways, for example, as 10549504 + 513294336 = 3248^2 + 22656^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 523843840.

It is not an unprimeable number, because it can be changed into a prime (523843843) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 900 + ... + 32380.

It is an arithmetic number, because the mean of its divisors is an integer number (18768519).

Almost surely, 2^523843840 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 523843840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (675666684).

523843840 is an abundant number, since it is smaller than the sum of its proper divisors (827489528).

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

523843840 is a wasteful number, since it uses less digits than its factorization.

523843840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31515 (or 31501 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 37.

The square root of 523843840 is about 22887.6350897160. The cubic root of 523843840 is about 806.1217031197.

The spelling of 523843840 in words is "five hundred twenty-three million, eight hundred forty-three thousand, eight hundred forty".