523505444 has 48 divisors (see below), whose sum is σ = 1146289536. Its totient is φ = 203232000.

The previous prime is 523505443. The next prime is 523505447. The reversal of 523505444 is 444505325.

It is a self number, because there is not a number n which added to its sum of digits gives 523505444.

It is not an unprimeable number, because it can be changed into a prime (523505443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87344 + ... + 93144.

It is an arithmetic number, because the mean of its divisors is an integer number (23881032).

Almost surely, 2^523505444 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 523505444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (573144768).

523505444 is an abundant number, since it is smaller than the sum of its proper divisors (622784092).

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

523505444 is a wasteful number, since it uses less digits than its factorization.

523505444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6116 (or 6114 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 32.

The square root of 523505444 is about 22880.2413448810. The cubic root of 523505444 is about 805.9480845084.

The spelling of 523505444 in words is "five hundred twenty-three million, five hundred five thousand, four hundred forty-four".