2278385 has 16 divisors (see below), whose sum is σ = 2980800. Its totient is φ = 1665216.

The previous prime is 2278379. The next prime is 2278421. The reversal of 2278385 is 5838722.

It is a happy number.

2278385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 2278385 - 2¹² = 2274289 is a prime.

It is an Ulam number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2342 + ... + 3168.

It is an arithmetic number, because the mean of its divisors is an integer number (186300).

2^2278385 is an apocalyptic number.

It is an amenable number.

2278385 is a deficient number, since it is larger than the sum of its proper divisors (702415).

2278385 is a wasteful number, since it uses less digits than its factorization.

2278385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880.

The product of its digits is 26880, while the sum is 35.

The square root of 2278385 is about 1509.4320123808. The cubic root of 2278385 is about 131.5858037550.

The spelling of 2278385 in words is "two million, two hundred seventy-eight thousand, three hundred eighty-five".