2289661 has 8 divisors (see below), whose sum is σ = 2515104. Its totient is φ = 2067120.

The previous prime is 2289659. The next prime is 2289667. The reversal of 2289661 is 1669822.

It is a happy number.

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

It is not a de Polignac number, because 2289661 - 2¹ = 2289659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2289667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1155 + ... + 2431.

It is an arithmetic number, because the mean of its divisors is an integer number (314388).

2^2289661 is an apocalyptic number.

It is an amenable number.

2289661 is a deficient number, since it is larger than the sum of its proper divisors (225443).

2289661 is a wasteful number, since it uses less digits than its factorization.

2289661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1451.

The product of its digits is 10368, while the sum is 34.

The square root of 2289661 is about 1513.1625821438. The cubic root of 2289661 is about 131.8025245843.

It can be divided in two parts, 228 and 9661, that added together give a palindrome (9889).

The spelling of 2289661 in words is "two million, two hundred eighty-nine thousand, six hundred sixty-one".