7879867844 has 12 divisors (see below), whose sum is σ = 13791641724. Its totient is φ = 3939398784.

The previous prime is 7879867843. The next prime is 7879867901. The reversal of 7879867844 is 4487689787.

It can be written as a sum of positive squares in 2 ways, for example, as 107329600 + 7772538244 = 10360^2 + 88162^2 .

It is not an unprimeable number, because it can be changed into a prime (7879867843) 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, 99689 + ... + 160304.

It is an arithmetic number, because the mean of its divisors is an integer number (1149303477).

Almost surely, 2^7879867844 is an apocalyptic number.

It is an amenable number.

7879867844 is a deficient number, since it is larger than the sum of its proper divisors (5911773880).

7879867844 is a wasteful number, since it uses less digits than its factorization.

7879867844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267574 (or 267572 counting only the distinct ones).

The product of its digits is 151732224, while the sum is 68.

The square root of 7879867844 is about 88768.6197031361. The cubic root of 7879867844 is about 1989.9384545329.

The spelling of 7879867844 in words is "seven billion, eight hundred seventy-nine million, eight hundred sixty-seven thousand, eight hundred forty-four".