72289922 has 8 divisors (see below), whose sum is σ = 108475200. Its totient is φ = 36131524.

The previous prime is 72289909. The next prime is 72289937. The reversal of 72289922 is 22998227.

It is a happy number.

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

It is a super-3 number, since 3×72289922³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72289922.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2579 + ... + 12297.

It is an arithmetic number, because the mean of its divisors is an integer number (13559400).

Almost surely, 2^72289922 is an apocalyptic number.

72289922 is a deficient number, since it is larger than the sum of its proper divisors (36185278).

72289922 is a wasteful number, since it uses less digits than its factorization.

72289922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13440.

The product of its digits is 72576, while the sum is 41.

The square root of 72289922 is about 8502.3480286330. The cubic root of 72289922 is about 416.5744075911.

The spelling of 72289922 in words is "seventy-two million, two hundred eighty-nine thousand, nine hundred twenty-two".