2290881 has 4 divisors (see below), whose sum is σ = 3054512. Its totient is φ = 1527252.

The previous prime is 2290861. The next prime is 2290889. The reversal of 2290881 is 1880922.

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 not a de Polignac number, because 2290881 - 2⁶ = 2290817 is a prime.

It is a super-2 number, since 2×2290881² = 10496271512322, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

2290881 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2290889) 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, 381811 + ... + 381816.

It is an arithmetic number, because the mean of its divisors is an integer number (763628).

2^2290881 is an apocalyptic number.

It is an amenable number.

2290881 is a deficient number, since it is larger than the sum of its proper divisors (763631).

2290881 is an equidigital number, since it uses as much as digits as its factorization.

2290881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763630.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 2290881 is about 1513.5656576442. The cubic root of 2290881 is about 131.8259298728.

The spelling of 2290881 in words is "two million, two hundred ninety thousand, eight hundred eighty-one".