2278865 has 8 divisors (see below), whose sum is σ = 2747520. Its totient is φ = 1814512.

The previous prime is 2278847. The next prime is 2278877. The reversal of 2278865 is 5688722.

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

It is a cyclic number.

It is not a de Polignac number, because 2278865 - 2¹⁰ = 2277841 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 242 + ... + 2148.

It is an arithmetic number, because the mean of its divisors is an integer number (343440).

2^2278865 is an apocalyptic number.

It is an amenable number.

2278865 is a deficient number, since it is larger than the sum of its proper divisors (468655).

2278865 is a wasteful number, since it uses less digits than its factorization.

2278865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2151.

The product of its digits is 53760, while the sum is 38.

The square root of 2278865 is about 1509.5910042127. The cubic root of 2278865 is about 131.5950437431.

It can be divided in two parts, 22 and 78865, that added together give a palindrome (78887).

The spelling of 2278865 in words is "two million, two hundred seventy-eight thousand, eight hundred sixty-five".