2861281896 has 128 divisors (see below), whose sum is σ = 8479641600. Its totient is φ = 794880000.

The previous prime is 2861281879. The next prime is 2861281901. The reversal of 2861281896 is 6981821682.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 146296 + ... + 164696.

It is an arithmetic number, because the mean of its divisors is an integer number (66247200).

Almost surely, 2^2861281896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2861281896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4239820800).

2861281896 is an abundant number, since it is smaller than the sum of its proper divisors (5618359704).

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

2861281896 is a wasteful number, since it uses less digits than its factorization.

2861281896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18471 (or 18467 counting only the distinct ones).

The product of its digits is 663552, while the sum is 51.

The square root of 2861281896 is about 53490.9515338809. The cubic root of 2861281896 is about 1419.6682912295.

The spelling of 2861281896 in words is "two billion, eight hundred sixty-one million, two hundred eighty-one thousand, eight hundred ninety-six".