2086438878 has 16 divisors (see below), whose sum is σ = 4636530960. Its totient is φ = 695479608.

The previous prime is 2086438877. The next prime is 2086438891. The reversal of 2086438878 is 8788346802.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 38637757 = 2086438878 / (2 + 0 + 8 + 6 + 4 + 3 + 8 + 8 + 7 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2086438877) 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 7 ways as a sum of consecutive naturals, for example, 19318825 + ... + 19318932.

It is an arithmetic number, because the mean of its divisors is an integer number (289783185).

Almost surely, 2^2086438878 is an apocalyptic number.

2086438878 is an abundant number, since it is smaller than the sum of its proper divisors (2550092082).

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

2086438878 is a wasteful number, since it uses less digits than its factorization.

2086438878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38637768 (or 38637762 counting only the distinct ones).

The product of its (nonzero) digits is 4128768, while the sum is 54.

The square root of 2086438878 is about 45677.5533276466. The cubic root of 2086438878 is about 1277.8166877634.

The spelling of 2086438878 in words is "two billion, eighty-six million, four hundred thirty-eight thousand, eight hundred seventy-eight".