7218881296 has 45 divisors (see below), whose sum is σ = 15381647239. Its totient is φ = 3279610400.

The previous prime is 7218881291. The next prime is 7218881297. The reversal of 7218881296 is 6921888127.

It is a happy number.

The square root of 7218881296 is 84964.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×7218881296² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7218881291) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3737451 + ... + 3739381.

Almost surely, 2^7218881296 is an apocalyptic number.

7218881296 is the 84964-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7218881296

7218881296 is an abundant number, since it is smaller than the sum of its proper divisors (8162765943).

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

7218881296 is an equidigital number, since it uses as much as digits as its factorization.

7218881296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3892 (or 1944 counting only the distinct ones).

The product of its digits is 774144, while the sum is 52.

The cubic root of 7218881296 is about 1932.6652302147.

The spelling of 7218881296 in words is "seven billion, two hundred eighteen million, eight hundred eighty-one thousand, two hundred ninety-six".