72228286 has 8 divisors (see below), whose sum is σ = 116676504. Its totient is φ = 33336120.

The previous prime is 72228271. The next prime is 72228293. The reversal of 72228286 is 68282227.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1388980 + ... + 1389031.

It is an arithmetic number, because the mean of its divisors is an integer number (14584563).

Almost surely, 2^72228286 is an apocalyptic number.

72228286 is a deficient number, since it is larger than the sum of its proper divisors (44448218).

72228286 is a wasteful number, since it uses less digits than its factorization.

72228286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2778026.

The product of its digits is 43008, while the sum is 37.

The square root of 72228286 is about 8498.7226098985. The cubic root of 72228286 is about 416.4559803828.

The spelling of 72228286 in words is "seventy-two million, two hundred twenty-eight thousand, two hundred eighty-six".