723504 has 20 divisors (see below), whose sum is σ = 1869176. Its totient is φ = 241152.

The previous prime is 723493. The next prime is 723529. The reversal of 723504 is 405327.

It is a happy number.

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

723504 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7489 + ... + 7584.

2⁷²³⁵⁰⁴ is an apocalyptic number.

It is an amenable number.

723504 is an abundant number, since it is smaller than the sum of its proper divisors (1145672).

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

723504 is a wasteful number, since it uses less digits than its factorization.

723504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15084 (or 15078 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 723504 is about 850.5903832045. The cubic root of 723504 is about 89.7732563884.

The spelling of 723504 in words is "seven hundred twenty-three thousand, five hundred four".