523305440 has 48 divisors (see below), whose sum is σ = 1412927712. Its totient is φ = 179418624.

The previous prime is 523305439. The next prime is 523305479. The reversal of 523305440 is 44503325.

It is a congruent number.

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, 232499 + ... + 234738.

It is an arithmetic number, because the mean of its divisors is an integer number (29435994).

Almost surely, 2^523305440 is an apocalyptic number.

It is an amenable number.

523305440 is an abundant number, since it is smaller than the sum of its proper divisors (889622272).

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

523305440 is a wasteful number, since it uses less digits than its factorization.

523305440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467259 (or 467251 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 26.

The square root of 523305440 is about 22875.8702566700. The cubic root of 523305440 is about 805.8454345903.

Adding to 523305440 its reverse (44503325), we get a palindrome (567808765).

The spelling of 523305440 in words is "five hundred twenty-three million, three hundred five thousand, four hundred forty".