72284227 has 4 divisors (see below), whose sum is σ = 76088680. Its totient is φ = 68479776.

The previous prime is 72284203. The next prime is 72284237. The reversal of 72284227 is 72248227.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72284227 - 2⁷ = 72284099 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72284192 and 72284201.

It is not an unprimeable number, because it can be changed into a prime (72284237) 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 3 ways as a sum of consecutive naturals, for example, 1902198 + ... + 1902235.

It is an arithmetic number, because the mean of its divisors is an integer number (19022170).

Almost surely, 2^72284227 is an apocalyptic number.

72284227 is a deficient number, since it is larger than the sum of its proper divisors (3804453).

72284227 is a wasteful number, since it uses less digits than its factorization.

72284227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3804452.

The product of its digits is 25088, while the sum is 34.

The square root of 72284227 is about 8502.0131145512. The cubic root of 72284227 is about 416.5634680600.

The spelling of 72284227 in words is "seventy-two million, two hundred eighty-four thousand, two hundred twenty-seven".