523512440 has 32 divisors (see below), whose sum is σ = 1284986160. Its totient is φ = 190368000.

The previous prime is 523512439. The next prime is 523512449. The reversal of 523512440 is 44215325.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523512449) 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, 594461 + ... + 595340.

Almost surely, 2^523512440 is an apocalyptic number.

It is an amenable number.

523512440 is an abundant number, since it is smaller than the sum of its proper divisors (761473720).

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

523512440 is a wasteful number, since it uses less digits than its factorization.

523512440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1189823 (or 1189819 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 523512440 is about 22880.3942273729. The cubic root of 523512440 is about 805.9516746574.

Adding to 523512440 its reverse (44215325), we get a palindrome (567727765).

The spelling of 523512440 in words is "five hundred twenty-three million, five hundred twelve thousand, four hundred forty".