523640460 has 144 divisors (see below), whose sum is σ = 1806071904. Its totient is φ = 112637952.

The previous prime is 523640449. The next prime is 523640483. The reversal of 523640460 is 64046325.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 44742 + ... + 55218.

It is an arithmetic number, because the mean of its divisors is an integer number (12542166).

Almost surely, 2^523640460 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 523640460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (903035952).

523640460 is an abundant number, since it is smaller than the sum of its proper divisors (1282431444).

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

523640460 is a wasteful number, since it uses less digits than its factorization.

523640460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10520 (or 10511 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 523640460 is about 22883.1916480197. The cubic root of 523640460 is about 806.0173652480.

Adding to 523640460 its reverse (64046325), we get a palindrome (587686785).

The spelling of 523640460 in words is "five hundred twenty-three million, six hundred forty thousand, four hundred sixty".