72228212 has 24 divisors (see below), whose sum is σ = 149439360. Its totient is φ = 29887200.

The previous prime is 72228161. The next prime is 72228227. The reversal of 72228212 is 21282227.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 43664 + ... + 45287.

It is an arithmetic number, because the mean of its divisors is an integer number (6226640).

Almost surely, 2^72228212 is an apocalyptic number.

It is an amenable number.

72228212 is an abundant number, since it is smaller than the sum of its proper divisors (77211148).

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

72228212 is a wasteful number, since it uses less digits than its factorization.

72228212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88991 (or 88989 counting only the distinct ones).

The product of its digits is 1792, while the sum is 26.

The square root of 72228212 is about 8498.7182563019. The cubic root of 72228212 is about 416.4558381590.

The spelling of 72228212 in words is "seventy-two million, two hundred twenty-eight thousand, two hundred twelve".