7228478668 has 12 divisors (see below), whose sum is σ = 12653027352. Its totient is φ = 3613328000.

The previous prime is 7228478657. The next prime is 7228478669. The reversal of 7228478668 is 8668748227.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (7228478669) 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 3 ways as a sum of consecutive naturals, for example, 209830 + ... + 241837.

It is an arithmetic number, because the mean of its divisors is an integer number (1054418946).

Almost surely, 2^7228478668 is an apocalyptic number.

It is an amenable number.

7228478668 is a deficient number, since it is larger than the sum of its proper divisors (5424548684).

7228478668 is a wasteful number, since it uses less digits than its factorization.

7228478668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455672 (or 455670 counting only the distinct ones).

The product of its digits is 14450688, while the sum is 58.

The square root of 7228478668 is about 85020.4602904501. The cubic root of 7228478668 is about 1933.5213320816.

The spelling of 7228478668 in words is "seven billion, two hundred twenty-eight million, four hundred seventy-eight thousand, six hundred sixty-eight".