722236 has 12 divisors (see below), whose sum is σ = 1276912. Its totient is φ = 357408.

The previous prime is 722213. The next prime is 722237. The reversal of 722236 is 632227.

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is a d-powerful number, because it can be written as 7² + 2 + 2¹⁷ + 2¹⁹ + 3¹⁰ + 6⁵ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 465 + ... + 1288.

2⁷²²²³⁶ is an apocalyptic number.

It is an amenable number.

722236 is a deficient number, since it is larger than the sum of its proper divisors (554676).

722236 is a wasteful number, since it uses less digits than its factorization.

722236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1860 (or 1858 counting only the distinct ones).

The product of its digits is 1008, while the sum is 22.

The square root of 722236 is about 849.8446916937. The cubic root of 722236 is about 89.7207807263.

Subtracting from 722236 its reverse (632227), we obtain a palindrome (90009).

The spelling of 722236 in words is "seven hundred twenty-two thousand, two hundred thirty-six".