7927198878 has 16 divisors (see below), whose sum is σ = 15855924096. Its totient is φ = 2642145240.

The previous prime is 7927198861. The next prime is 7927198879. The reversal of 7927198878 is 8788917297.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7927198879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10575 + ... + 126357.

It is an arithmetic number, because the mean of its divisors is an integer number (990995256).

Almost surely, 2^7927198878 is an apocalyptic number.

7927198878 is an abundant number, since it is smaller than the sum of its proper divisors (7928725218).

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

7927198878 is a wasteful number, since it uses less digits than its factorization.

7927198878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127199.

The product of its digits is 28449792, while the sum is 66.

The square root of 7927198878 is about 89034.8183465323. The cubic root of 7927198878 is about 1993.9147434379.

The spelling of 7927198878 in words is "seven billion, nine hundred twenty-seven million, one hundred ninety-eight thousand, eight hundred seventy-eight".