523909240 has 64 divisors (see below), whose sum is σ = 1205940960. Its totient is φ = 204771840.

The previous prime is 523909237. The next prime is 523909241. The reversal of 523909240 is 42909325.

It is a junction number, because it is equal to n+sod(n) for n = 523909196 and 523909205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523909241) 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, 892227 + ... + 892813.

Almost surely, 2^523909240 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 523909240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (602970480).

523909240 is an abundant number, since it is smaller than the sum of its proper divisors (682031720).

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

523909240 is a wasteful number, since it uses less digits than its factorization.

523909240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1072 (or 1068 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 523909240 is about 22889.0637641648. The cubic root of 523909240 is about 806.1552488456.

The spelling of 523909240 in words is "five hundred twenty-three million, nine hundred nine thousand, two hundred forty".