2863881 has 6 divisors (see below), whose sum is σ = 4136730. Its totient is φ = 1909248.

The previous prime is 2863879. The next prime is 2863897. The reversal of 2863881 is 1883682.

2863881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1742400 + 1121481 = 1320^2 + 1059^2 .

It is not a de Polignac number, because 2863881 - 2¹ = 2863879 is a prime.

It is a super-2 number, since 2×2863881² = 16403628764322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2863841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 159096 + ... + 159113.

It is an arithmetic number, because the mean of its divisors is an integer number (689455).

2^2863881 is an apocalyptic number.

It is an amenable number.

2863881 is a deficient number, since it is larger than the sum of its proper divisors (1272849).

2863881 is a wasteful number, since it uses less digits than its factorization.

2863881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318215 (or 318212 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 2863881 is about 1692.3005052295. The cubic root of 2863881 is about 142.0098022725.

The spelling of 2863881 in words is "two million, eight hundred sixty-three thousand, eight hundred eighty-one".