523432240 has 80 divisors (see below), whose sum is σ = 1270606176. Its totient is φ = 200345600.

The previous prime is 523432211. The next prime is 523432243. The reversal of 523432240 is 42234325.

It is a tau number, because it is divible by the number of its divisors (80).

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (523432243) 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, 172335 + ... + 175345.

Almost surely, 2^523432240 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 523432240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (635303088).

523432240 is an abundant number, since it is smaller than the sum of its proper divisors (747173936).

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

523432240 is a wasteful number, since it uses less digits than its factorization.

523432240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3118 (or 3112 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 25.

The square root of 523432240 is about 22878.6415680652. The cubic root of 523432240 is about 805.9105163707.

Adding to 523432240 its reverse (42234325), we get a palindrome (565666565).

The spelling of 523432240 in words is "five hundred twenty-three million, four hundred thirty-two thousand, two hundred forty".