7218788208 has 40 divisors (see below), whose sum is σ = 19152555408. Its totient is φ = 2341228032.

The previous prime is 7218788201. The next prime is 7218788221. The reversal of 7218788208 is 8028878127.

It is a super-2 number, since 2×7218788208² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7218788201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2030541 + ... + 2034092.

Almost surely, 2^7218788208 is an apocalyptic number.

It is an amenable number.

7218788208 is an abundant number, since it is smaller than the sum of its proper divisors (11933767200).

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

7218788208 is a wasteful number, since it uses less digits than its factorization.

7218788208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4064681 (or 4064675 counting only the distinct ones).

The product of its (nonzero) digits is 802816, while the sum is 51.

The square root of 7218788208 is about 84963.4521897504. The cubic root of 7218788208 is about 1932.6569228927.

The spelling of 7218788208 in words is "seven billion, two hundred eighteen million, seven hundred eighty-eight thousand, two hundred eight".