2788881 has 4 divisors (see below), whose sum is σ = 3718512. Its totient is φ = 1859252.

The previous prime is 2788831. The next prime is 2788889. The reversal of 2788881 is 1888872.

It is a happy number.

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 2788881 - 2⁶ = 2788817 is a prime.

It is a super-2 number, since 2×2788881² = 15555714464322, which contains 22 as substring.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (2788889) 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, 464811 + ... + 464816.

It is an arithmetic number, because the mean of its divisors is an integer number (929628).

2^2788881 is an apocalyptic number.

It is an amenable number.

2788881 is a deficient number, since it is larger than the sum of its proper divisors (929631).

2788881 is an equidigital number, since it uses as much as digits as its factorization.

2788881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929630.

The product of its digits is 57344, while the sum is 42.

The square root of 2788881 is about 1669.9943113676. The cubic root of 2788881 is about 140.7591582913.

Subtracting from 2788881 its reverse (1888872), we obtain a palindrome (900009).

The spelling of 2788881 in words is "two million, seven hundred eighty-eight thousand, eight hundred eighty-one".