722304 has 128 divisors (see below), whose sum is σ = 2448000. Its totient is φ = 207360.

The previous prime is 722299. The next prime is 722311. The reversal of 722304 is 403227.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

722304 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38007 + ... + 38025.

It is an arithmetic number, because the mean of its divisors is an integer number (19125).

2⁷²²³⁰⁴ 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 722304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1224000).

722304 is an abundant number, since it is smaller than the sum of its proper divisors (1725696).

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

722304 is a wasteful number, since it uses less digits than its factorization.

722304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53 (or 35 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 722304 is about 849.8846980620. The cubic root of 722304 is about 89.7235964365.

The spelling of 722304 in words is "seven hundred twenty-two thousand, three hundred four", and thus it is an iban number.