72612226 has 16 divisors (see below), whose sum is σ = 111419064. Its totient is φ = 35478144.

The previous prime is 72612223. The next prime is 72612229. The reversal of 72612226 is 62221627.

It is an interprime number because it is at equal distance from previous prime (72612223) and next prime (72612229).

It can be written as a sum of positive squares in 4 ways, for example, as 65044225 + 7568001 = 8065^2 + 2751^2 .

It is a junction number, because it is equal to n+sod(n) for n = 72612194 and 72612203.

It is not an unprimeable number, because it can be changed into a prime (72612223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28126 + ... + 30598.

Almost surely, 2^72612226 is an apocalyptic number.

72612226 is a deficient number, since it is larger than the sum of its proper divisors (38806838).

72612226 is a wasteful number, since it uses less digits than its factorization.

72612226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2805.

The product of its digits is 4032, while the sum is 28.

The square root of 72612226 is about 8521.2807722783. The cubic root of 72612226 is about 417.1925875957.

The spelling of 72612226 in words is "seventy-two million, six hundred twelve thousand, two hundred twenty-six".