72267226 has 16 divisors (see below), whose sum is σ = 110718504. Its totient is φ = 35368704.

The previous prime is 72267197. The next prime is 72267227. The reversal of 72267226 is 62276227.

It can be written as a sum of positive squares in 4 ways, for example, as 42575625 + 29691601 = 6525^2 + 5449^2 .

It is a junction number, because it is equal to n+sod(n) for n = 72267191 and 72267200.

It is not an unprimeable number, because it can be changed into a prime (72267227) 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, 18196 + ... + 21808.

Almost surely, 2^72267226 is an apocalyptic number.

72267226 is a deficient number, since it is larger than the sum of its proper divisors (38451278).

72267226 is a wasteful number, since it uses less digits than its factorization.

72267226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3825.

The product of its digits is 28224, while the sum is 34.

The square root of 72267226 is about 8501.0132337269. The cubic root of 72267226 is about 416.5308074040.

Subtracting from 72267226 its reverse (62276227), we obtain a palindrome (9990999).

The spelling of 72267226 in words is "seventy-two million, two hundred sixty-seven thousand, two hundred twenty-six".