726222 has 16 divisors (see below), whose sum is σ = 1660032. Its totient is φ = 207480.

The previous prime is 726221. The next prime is 726287. The reversal of 726222 is 222627.

726222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726221) 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, 8604 + ... + 8687.

It is an arithmetic number, because the mean of its divisors is an integer number (103752).

2⁷²⁶²²² is an apocalyptic number.

726222 is an abundant number, since it is smaller than the sum of its proper divisors (933810).

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

726222 is a wasteful number, since it uses less digits than its factorization.

726222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17303.

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

The square root of 726222 is about 852.1865992845. The cubic root of 726222 is about 89.8855334898.

Adding to 726222 its reverse (222627), we get a palindrome (948849).

The spelling of 726222 in words is "seven hundred twenty-six thousand, two hundred twenty-two".