72228655 has 8 divisors (see below), whose sum is σ = 87895584. Its totient is φ = 56968800.

The previous prime is 72228643. The next prime is 72228659. The reversal of 72228655 is 55682227.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72228655 - 2⁵ = 72228623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72228659) 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, 101376 + ... + 102085.

It is an arithmetic number, because the mean of its divisors is an integer number (10986948).

Almost surely, 2^72228655 is an apocalyptic number.

72228655 is a deficient number, since it is larger than the sum of its proper divisors (15666929).

72228655 is a wasteful number, since it uses less digits than its factorization.

72228655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203537.

The product of its digits is 67200, while the sum is 37.

The square root of 72228655 is about 8498.7443190156. The cubic root of 72228655 is about 416.4566895786.

The spelling of 72228655 in words is "seventy-two million, two hundred twenty-eight thousand, six hundred fifty-five".