72296226 has 20 divisors (see below), whose sum is σ = 161997462. Its totient is φ = 24098688.

The previous prime is 72296221. The next prime is 72296227. The reversal of 72296226 is 62269227.

72296226 is a `hidden beast` number, since 7 + 2 + 29 + 622 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 36905625 + 35390601 = 6075^2 + 5949^2 .

It is not an unprimeable number, because it can be changed into a prime (72296221) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 222975 + ... + 223298.

Almost surely, 2^72296226 is an apocalyptic number.

72296226 is an abundant number, since it is smaller than the sum of its proper divisors (89701236).

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

72296226 is a wasteful number, since it uses less digits than its factorization.

72296226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446287 (or 446278 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 72296226 is about 8502.7187416732. The cubic root of 72296226 is about 416.5865162810.

The spelling of 72296226 in words is "seventy-two million, two hundred ninety-six thousand, two hundred twenty-six".