72222398 has 8 divisors (see below), whose sum is σ = 108783840. Its totient is φ = 35961120.

The previous prime is 72222391. The next prime is 72222421. The reversal of 72222398 is 89322227.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72222391) 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 3 ways as a sum of consecutive naturals, for example, 74438 + ... + 75401.

It is an arithmetic number, because the mean of its divisors is an integer number (13597980).

Almost surely, 2^72222398 is an apocalyptic number.

72222398 is a deficient number, since it is larger than the sum of its proper divisors (36561442).

72222398 is a wasteful number, since it uses less digits than its factorization.

72222398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150082.

The product of its digits is 24192, while the sum is 35.

The square root of 72222398 is about 8498.3761978392. The cubic root of 72222398 is about 416.4446636740. Note that the first 3 decimals are identical.

The spelling of 72222398 in words is "seventy-two million, two hundred twenty-two thousand, three hundred ninety-eight".