2289857 has 4 divisors (see below), whose sum is σ = 2389440. Its totient is φ = 2190276.

The previous prime is 2289841. The next prime is 2289863. The reversal of 2289857 is 7589822.

2289857 = 54² + 55² + ... + 191².

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 2289857 - 2⁴ = 2289841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2289817) 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, 49757 + ... + 49802.

It is an arithmetic number, because the mean of its divisors is an integer number (597360).

2^2289857 is an apocalyptic number.

It is an amenable number.

2289857 is a deficient number, since it is larger than the sum of its proper divisors (99583).

2289857 is an equidigital number, since it uses as much as digits as its factorization.

2289857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99582.

The product of its digits is 80640, while the sum is 41.

The square root of 2289857 is about 1513.2273457746. The cubic root of 2289857 is about 131.8062853387.

The spelling of 2289857 in words is "two million, two hundred eighty-nine thousand, eight hundred fifty-seven".