2799881 has 4 divisors (see below), whose sum is σ = 3199872. Its totient is φ = 2399892.

The previous prime is 2799871. The next prime is 2799887. The reversal of 2799881 is 1889972.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2799881 - 2⁶ = 2799817 is a prime.

It is a super-2 number, since 2×2799881² = 15678667228322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2799887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199985 + ... + 199998.

It is an arithmetic number, because the mean of its divisors is an integer number (799968).

2^2799881 is an apocalyptic number.

It is an amenable number.

2799881 is a deficient number, since it is larger than the sum of its proper divisors (399991).

2799881 is an equidigital number, since it uses as much as digits as its factorization.

2799881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399990.

The product of its digits is 72576, while the sum is 44.

The square root of 2799881 is about 1673.2844946392. The cubic root of 2799881 is about 140.9439778784.

Subtracting from 2799881 its reverse (1889972), we obtain a palindrome (909909).

The spelling of 2799881 in words is "two million, seven hundred ninety-nine thousand, eight hundred eighty-one".