523638726 has 96 divisors (see below), whose sum is σ = 1234696608. Its totient is φ = 147363840.

The previous prime is 523638721. The next prime is 523638737. The reversal of 523638726 is 627836325.

It is a happy number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523638721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 637396 + ... + 638216.

It is an arithmetic number, because the mean of its divisors is an integer number (12861423).

Almost surely, 2^523638726 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 523638726, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (617348304).

523638726 is an abundant number, since it is smaller than the sum of its proper divisors (711057882).

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

523638726 is a wasteful number, since it uses less digits than its factorization.

523638726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906 (or 893 counting only the distinct ones).

The product of its digits is 362880, while the sum is 42.

The square root of 523638726 is about 22883.1537599169. The cubic root of 523638726 is about 806.0164755564.

The spelling of 523638726 in words is "five hundred twenty-three million, six hundred thirty-eight thousand, seven hundred twenty-six".