523604 has 12 divisors (see below), whose sum is σ = 921984. Its totient is φ = 260184.

The previous prime is 523603. The next prime is 523631. The reversal of 523604 is 406325.

It is a super-2 number, since 2×523604² = 548322297632, which contains 22 as substring.

It is a fibodiv number, since the Fibonacci-like sequence with seeds 52 and 3604 contains 523604 itself.

It is an Ulam number.

It is a nialpdrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 599 + ... + 1185.

It is an arithmetic number, because the mean of its divisors is an integer number (76832).

2⁵²³⁶⁰⁴ is an apocalyptic number.

It is an amenable number.

523604 is a deficient number, since it is larger than the sum of its proper divisors (398380).

523604 is a wasteful number, since it uses less digits than its factorization.

523604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814 (or 812 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 523604 is about 723.6048645497. The cubic root of 523604 is about 80.5998657708.

Adding to 523604 its reverse (406325), we get a palindrome (929929).

The spelling of 523604 in words is "five hundred twenty-three thousand, six hundred four".