7726826820 has 24 divisors (see below), whose sum is σ = 21635115264. Its totient is φ = 2060487136.

The previous prime is 7726826813. The next prime is 7726826867. The reversal of 7726826820 is 286286277.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 7726826820.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64390164 + ... + 64390283.

It is an arithmetic number, because the mean of its divisors is an integer number (901463136).

Almost surely, 2^7726826820 is an apocalyptic number.

It is an amenable number.

7726826820 is an abundant number, since it is smaller than the sum of its proper divisors (13908288444).

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

7726826820 is a wasteful number, since it uses less digits than its factorization.

7726826820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128780459 (or 128780457 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 48.

The square root of 7726826820 is about 87902.3709577848. The cubic root of 7726826820 is about 1976.9714284802.

The spelling of 7726826820 in words is "seven billion, seven hundred twenty-six million, eight hundred twenty-six thousand, eight hundred twenty".