523680640 has 96 divisors (see below), whose sum is σ = 1456407000. Its totient is φ = 179536896.

The previous prime is 523680623. The next prime is 523680667. The reversal of 523680640 is 46086325.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 523680596 and 523680605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23011 + ... + 39709.

Almost surely, 2^523680640 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 523680640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (728203500).

523680640 is an abundant number, since it is smaller than the sum of its proper divisors (932726360).

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

523680640 is a wasteful number, since it uses less digits than its factorization.

523680640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16732 (or 16713 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 523680640 is about 22884.0695681516. The cubic root of 523680640 is about 806.0379805060.

The spelling of 523680640 in words is "five hundred twenty-three million, six hundred eighty thousand, six hundred forty".