723444 has 36 divisors (see below), whose sum is σ = 1792224. Its totient is φ = 227088.

The previous prime is 723439. The next prime is 723451. The reversal of 723444 is 444327.

723444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×723444² = 1046742442272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4249 + ... + 4415.

It is an arithmetic number, because the mean of its divisors is an integer number (49784).

2⁷²³⁴⁴⁴ 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 723444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (896112).

723444 is an abundant number, since it is smaller than the sum of its proper divisors (1068780).

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

723444 is a wasteful number, since it uses less digits than its factorization.

723444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212 (or 191 counting only the distinct ones).

The product of its digits is 2688, while the sum is 24.

The square root of 723444 is about 850.5551128528. Note that the first 3 decimals coincide. The cubic root of 723444 is about 89.7707746955.

The spelling of 723444 in words is "seven hundred twenty-three thousand, four hundred forty-four", and thus it is an iban number.