2887881 has 4 divisors (see below), whose sum is σ = 3850512. Its totient is φ = 1925252.

The previous prime is 2887879. The next prime is 2887883. The reversal of 2887881 is 1887882.

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 an interprime number because it is at equal distance from previous prime (2887879) and next prime (2887883).

It is a cyclic number.

It is not a de Polignac number, because 2887881 - 2¹ = 2887879 is a prime.

It is a super-2 number, since 2×2887881² = 16679713340322, which contains 22 as substring.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (2887883) 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, 481311 + ... + 481316.

It is an arithmetic number, because the mean of its divisors is an integer number (962628).

2^2887881 is an apocalyptic number.

It is an amenable number.

2887881 is a deficient number, since it is larger than the sum of its proper divisors (962631).

2887881 is an equidigital number, since it uses as much as digits as its factorization.

2887881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962630.

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

The square root of 2887881 is about 1699.3766504221. The cubic root of 2887881 is about 142.4053911869.

Subtracting from 2887881 its reverse (1887882), we obtain a palindrome (999999).

The spelling of 2887881 in words is "two million, eight hundred eighty-seven thousand, eight hundred eighty-one".