72222258 has 32 divisors (see below), whose sum is σ = 147393792. Its totient is φ = 23587200.

The previous prime is 72222253. The next prime is 72222259. The reversal of 72222258 is 85222227.

It is not an unprimeable number, because it can be changed into a prime (72222251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78823 + ... + 79733.

It is an arithmetic number, because the mean of its divisors is an integer number (4606056).

Almost surely, 2^72222258 is an apocalyptic number.

72222258 is an abundant number, since it is smaller than the sum of its proper divisors (75171534).

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

72222258 is a wasteful number, since it uses less digits than its factorization.

72222258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1170.

The product of its digits is 8960, while the sum is 30.

The square root of 72222258 is about 8498.3679609676. The cubic root of 72222258 is about 416.4443945872. Note that the first 3 decimals are identical.

The spelling of 72222258 in words is "seventy-two million, two hundred twenty-two thousand, two hundred fifty-eight".