2087719978 has 32 divisors (see below), whose sum is σ = 3243442176. Its totient is φ = 1007297328.

The previous prime is 2087719973. The next prime is 2087720009. The reversal of 2087719978 is 8799177802.

It is not an unprimeable number, because it can be changed into a prime (2087719973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3707925 + ... + 3708487.

It is an arithmetic number, because the mean of its divisors is an integer number (101357568).

Almost surely, 2^2087719978 is an apocalyptic number.

2087719978 is a deficient number, since it is larger than the sum of its proper divisors (1155722198).

2087719978 is a wasteful number, since it uses less digits than its factorization.

2087719978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1098.

The product of its (nonzero) digits is 3556224, while the sum is 58.

The square root of 2087719978 is about 45691.5744749511. The cubic root of 2087719978 is about 1278.0781661515.

The spelling of 2087719978 in words is "two billion, eighty-seven million, seven hundred nineteen thousand, nine hundred seventy-eight".