723408 has 40 divisors (see below), whose sum is σ = 2136768. Its totient is φ = 206592.

The previous prime is 723407. The next prime is 723409. The reversal of 723408 is 804327.

It is an interprime number because it is at equal distance from previous prime (723407) and next prime (723409).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (723407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 741 + ... + 1412.

2⁷²³⁴⁰⁸ is an apocalyptic number.

It is an amenable number.

723408 is an abundant number, since it is smaller than the sum of its proper divisors (1413360).

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

723408 is a wasteful number, since it uses less digits than its factorization.

723408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2171 (or 2165 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 723408 is about 850.5339499397. The cubic root of 723408 is about 89.7692856138.

The spelling of 723408 in words is "seven hundred twenty-three thousand, four hundred eight".