72228663 has 12 divisors (see below), whose sum is σ = 112355880. Its totient is φ = 44448336.

The previous prime is 72228659. The next prime is 72228701. The reversal of 72228663 is 36682227.

It is not a de Polignac number, because 72228663 - 2² = 72228659 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72228623) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 308553 + ... + 308786.

It is an arithmetic number, because the mean of its divisors is an integer number (9362990).

Almost surely, 2^72228663 is an apocalyptic number.

72228663 is a deficient number, since it is larger than the sum of its proper divisors (40127217).

72228663 is a wasteful number, since it uses less digits than its factorization.

72228663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617358 (or 617355 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 72228663 is about 8498.7447896734. The cubic root of 72228663 is about 416.4567049541.

The spelling of 72228663 in words is "seventy-two million, two hundred twenty-eight thousand, six hundred sixty-three".