72220322 has 8 divisors (see below), whose sum is σ = 113040576. Its totient is φ = 34540132.

The previous prime is 72220289. The next prime is 72220327. The reversal of 72220322 is 22302227.

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

It is a junction number, because it is equal to n+sod(n) for n = 72220294 and 72220303.

It is not an unprimeable number, because it can be changed into a prime (72220327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 784958 + ... + 785049.

It is an arithmetic number, because the mean of its divisors is an integer number (14130072).

Almost surely, 2^72220322 is an apocalyptic number.

72220322 is a deficient number, since it is larger than the sum of its proper divisors (40820254).

72220322 is a wasteful number, since it uses less digits than its factorization.

72220322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1570032.

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 72220322 is about 8498.2540559811. The cubic root of 72220322 is about 416.4406734649.

Adding to 72220322 its reverse (22302227), we get a palindrome (94522549).

The spelling of 72220322 in words is "seventy-two million, two hundred twenty thousand, three hundred twenty-two".