2888671981 has 4 divisors (see below), whose sum is σ = 3110877532. Its totient is φ = 2666466432.

The previous prime is 2888671963. The next prime is 2888672041. The reversal of 2888671981 is 1891768882.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1897996356 + 990675625 = 43566^2 + 31475^2 .

It is a cyclic number.

It is not a de Polignac number, because 2888671981 - 2²⁵ = 2855117549 is a prime.

It is a super-2 number, since 2×2888671981² = 16688851627628928722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2888671081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111102756 + ... + 111102781.

It is an arithmetic number, because the mean of its divisors is an integer number (777719383).

Almost surely, 2^2888671981 is an apocalyptic number.

It is an amenable number.

2888671981 is a deficient number, since it is larger than the sum of its proper divisors (222205551).

2888671981 is a wasteful number, since it uses less digits than its factorization.

2888671981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222205550.

The product of its digits is 3096576, while the sum is 58.

The square root of 2888671981 is about 53746.3671423474. The cubic root of 2888671981 is about 1424.1839145440.

The spelling of 2888671981 in words is "two billion, eight hundred eighty-eight million, six hundred seventy-one thousand, nine hundred eighty-one".