72222078 has 32 divisors (see below), whose sum is σ = 152755200. Its totient is φ = 22700736.

The previous prime is 72222071. The next prime is 72222079. The reversal of 72222078 is 87022227.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72222071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25203 + ... + 27921.

It is an arithmetic number, because the mean of its divisors is an integer number (4773600).

Almost surely, 2^72222078 is an apocalyptic number.

72222078 is an abundant number, since it is smaller than the sum of its proper divisors (80533122).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72222078 is a wasteful number, since it uses less digits than its factorization.

72222078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2976.

The product of its (nonzero) digits is 6272, while the sum is 30.

The square root of 72222078 is about 8498.3573706923. The cubic root of 72222078 is about 416.4440486179. Note that the first 3 decimals are identical.

The spelling of 72222078 in words is "seventy-two million, two hundred twenty-two thousand, seventy-eight".