72229288 has 16 divisors (see below), whose sum is σ = 135531360. Its totient is φ = 36087600.

The previous prime is 72229273. The next prime is 72229321. The reversal of 72229288 is 88292227.

It is a self number, because there is not a number n which added to its sum of digits gives 72229288.

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, 12183 + ... + 17113.

It is an arithmetic number, because the mean of its divisors is an integer number (8470710).

Almost surely, 2^72229288 is an apocalyptic number.

It is an amenable number.

72229288 is a deficient number, since it is larger than the sum of its proper divisors (63302072).

72229288 is a wasteful number, since it uses less digits than its factorization.

72229288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6768 (or 6764 counting only the distinct ones).

The product of its digits is 64512, while the sum is 40.

The square root of 72229288 is about 8498.7815597296. The cubic root of 72229288 is about 416.4579061610.

The spelling of 72229288 in words is "seventy-two million, two hundred twenty-nine thousand, two hundred eighty-eight".