523632440 has 32 divisors (see below), whose sum is σ = 1179323280. Its totient is φ = 209248512.

The previous prime is 523632437. The next prime is 523632449. The reversal of 523632440 is 44236325.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523632449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39092 + ... + 50748.

Almost surely, 2^523632440 is an apocalyptic number.

It is an amenable number.

523632440 is an abundant number, since it is smaller than the sum of its proper divisors (655690840).

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

523632440 is a wasteful number, since it uses less digits than its factorization.

523632440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12791 (or 12787 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 29.

The square root of 523632440 is about 22883.0164095558. The cubic root of 523632440 is about 806.0132502794.

Adding to 523632440 its reverse (44236325), we get a palindrome (567868765).

The spelling of 523632440 in words is "five hundred twenty-three million, six hundred thirty-two thousand, four hundred forty".