2881865 has 8 divisors (see below), whose sum is σ = 3952320. Its totient is φ = 1976112.

The previous prime is 2881861. The next prime is 2881867. The reversal of 2881865 is 5681882.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2881865 - 2² = 2881861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2881861) 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 7 ways as a sum of consecutive naturals, for example, 41135 + ... + 41204.

It is an arithmetic number, because the mean of its divisors is an integer number (494040).

2^2881865 is an apocalyptic number.

It is an amenable number.

2881865 is a deficient number, since it is larger than the sum of its proper divisors (1070455).

2881865 is an equidigital number, since it uses as much as digits as its factorization.

2881865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82351.

The product of its digits is 30720, while the sum is 38.

The square root of 2881865 is about 1697.6056668143. The cubic root of 2881865 is about 142.3064366917.

The spelling of 2881865 in words is "two million, eight hundred eighty-one thousand, eight hundred sixty-five".