523404040 has 32 divisors (see below), whose sum is σ = 1180494360. Its totient is φ = 208857600.

The previous prime is 523404017. The next prime is 523404053. The reversal of 523404040 is 40404325.

It is a happy number.

523404040 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 189172516 + 334231524 = 13754^2 + 18282^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1300 + ... + 32380.

Almost surely, 2^523404040 is an apocalyptic number.

It is an amenable number.

523404040 is an abundant number, since it is smaller than the sum of its proper divisors (657090320).

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

523404040 is a wasteful number, since it uses less digits than its factorization.

523404040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31513 (or 31509 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 523404040 is about 22878.0252644322. The cubic root of 523404040 is about 805.8960432559.

Adding to 523404040 its reverse (40404325), we get a palindrome (563808365).

The spelling of 523404040 in words is "five hundred twenty-three million, four hundred four thousand, forty".