7220916638 has 16 divisors (see below), whose sum is σ = 11949060816. Its totient is φ = 3251444160.

The previous prime is 7220916629. The next prime is 7220916643. The reversal of 7220916638 is 8366190227.

It is a congruent number.

It is an unprimeable number.

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, 3385856 + ... + 3387987.

It is an arithmetic number, because the mean of its divisors is an integer number (746816301).

Almost surely, 2^7220916638 is an apocalyptic number.

7220916638 is a deficient number, since it is larger than the sum of its proper divisors (4728144178).

7220916638 is a wasteful number, since it uses less digits than its factorization.

7220916638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6773899.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 7220916638 is about 84975.9768287485. The cubic root of 7220916638 is about 1932.8468495413.

The spelling of 7220916638 in words is "seven billion, two hundred twenty million, nine hundred sixteen thousand, six hundred thirty-eight".