7879867842 has 32 divisors (see below), whose sum is σ = 19648502784. Its totient is φ = 2046718800.

The previous prime is 7879867819. The next prime is 7879867843. The reversal of 7879867842 is 2487689787.

It is a Harshad number since it is a multiple of its sum of digits (66).

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 15 ways as a sum of consecutive naturals, for example, 8527534 + ... + 8528457.

It is an arithmetic number, because the mean of its divisors is an integer number (614015712).

Almost surely, 2^7879867842 is an apocalyptic number.

7879867842 is an abundant number, since it is smaller than the sum of its proper divisors (11768634942).

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

7879867842 is a wasteful number, since it uses less digits than its factorization.

7879867842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17056014.

The product of its digits is 75866112, while the sum is 66.

The square root of 7879867842 is about 88768.6196918708. The cubic root of 7879867842 is about 1989.9384543645.

The spelling of 7879867842 in words is "seven billion, eight hundred seventy-nine million, eight hundred sixty-seven thousand, eight hundred forty-two".