2828991681 has 12 divisors (see below), whose sum is σ = 4301391120. Its totient is φ = 1786731480.

The previous prime is 2828991667. The next prime is 2828991691. The reversal of 2828991681 is 1861998282.

It is not a de Polignac number, because 2828991681 - 2¹⁰ = 2828990657 is a prime.

It is a super-2 number, since 2×2828991681² = 16006387862334411522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2828991611) 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 11 ways as a sum of consecutive naturals, for example, 8271735 + ... + 8272076.

It is an arithmetic number, because the mean of its divisors is an integer number (358449260).

Almost surely, 2^2828991681 is an apocalyptic number.

It is an amenable number.

2828991681 is a deficient number, since it is larger than the sum of its proper divisors (1472399439).

2828991681 is a wasteful number, since it uses less digits than its factorization.

2828991681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16543836 (or 16543833 counting only the distinct ones).

The product of its digits is 995328, while the sum is 54.

The square root of 2828991681 is about 53188.2663846078. The cubic root of 2828991681 is about 1414.3076488224.

The spelling of 2828991681 in words is "two billion, eight hundred twenty-eight million, nine hundred ninety-one thousand, six hundred eighty-one".