7991376628 has 12 divisors (see below), whose sum is σ = 13985691300. Its totient is φ = 3995464832.

The previous prime is 7991376607. The next prime is 7991376629. The reversal of 7991376628 is 8266731997.

It can be written as a sum of positive squares in 2 ways, for example, as 1197990544 + 6793386084 = 34612^2 + 82422^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7991376629) 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, 44700 + ... + 134092.

It is an arithmetic number, because the mean of its divisors is an integer number (1165474275).

Almost surely, 2^7991376628 is an apocalyptic number.

It is an amenable number.

7991376628 is a deficient number, since it is larger than the sum of its proper divisors (5994314672).

7991376628 is a wasteful number, since it uses less digits than its factorization.

7991376628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111746 (or 111744 counting only the distinct ones).

The product of its digits is 6858432, while the sum is 58.

The square root of 7991376628 is about 89394.4999874153. The cubic root of 7991376628 is about 1999.2811273087.

The spelling of 7991376628 in words is "seven billion, nine hundred ninety-one million, three hundred seventy-six thousand, six hundred twenty-eight".