723904 has 14 divisors (see below), whose sum is σ = 1436624. Its totient is φ = 361920.

The previous prime is 723901. The next prime is 723907. The reversal of 723904 is 409327.

723904 = 2² + 3² + ... + 129².

It is an interprime number because it is at equal distance from previous prime (723901) and next prime (723907).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (723901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5592 + ... + 5719.

It is an arithmetic number, because the mean of its divisors is an integer number (102616).

2⁷²³⁹⁰⁴ is an apocalyptic number.

It is an amenable number.

723904 is a deficient number, since it is larger than the sum of its proper divisors (712720).

723904 is a wasteful number, since it uses less digits than its factorization.

723904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11323 (or 11313 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 723904 is about 850.8254815178. The cubic root of 723904 is about 89.7897975026.

The spelling of 723904 in words is "seven hundred twenty-three thousand, nine hundred four".