2178886142 has 16 divisors (see below), whose sum is σ = 3444403200. Its totient is φ = 1030887000.

The previous prime is 2178886139. The next prime is 2178886159. The reversal of 2178886142 is 2416888712.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 734 + ... + 66017.

It is an arithmetic number, because the mean of its divisors is an integer number (215275200).

Almost surely, 2^2178886142 is an apocalyptic number.

2178886142 is a deficient number, since it is larger than the sum of its proper divisors (1265517058).

2178886142 is a wasteful number, since it uses less digits than its factorization.

2178886142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67631.

The product of its digits is 344064, while the sum is 47.

The square root of 2178886142 is about 46678.5404870375. The cubic root of 2178886142 is about 1296.4173828234.

The spelling of 2178886142 in words is "two billion, one hundred seventy-eight million, eight hundred eighty-six thousand, one hundred forty-two".