722064 has 60 divisors (see below), whose sum is σ = 2176944. Its totient is φ = 205632.

The previous prime is 722063. The next prime is 722069. The reversal of 722064 is 460227.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 722064.

It is not an unprimeable number, because it can be changed into a prime (722063) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2199 + ... + 2505.

2⁷²²⁰⁶⁴ 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 722064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1088472).

722064 is an abundant number, since it is smaller than the sum of its proper divisors (1454880).

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

722064 is a wasteful number, since it uses less digits than its factorization.

722064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332 (or 319 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 722064 is about 849.7434907076. The cubic root of 722064 is about 89.7136578471.

The spelling of 722064 in words is "seven hundred twenty-two thousand, sixty-four".