2205678 has 8 divisors (see below), whose sum is σ = 4411368. Its totient is φ = 735224.

The previous prime is 2205667. The next prime is 2205703. The reversal of 2205678 is 8765022.

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

2205678 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183801 + ... + 183812.

It is an arithmetic number, because the mean of its divisors is an integer number (551421).

2^2205678 is an apocalyptic number.

2205678 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2205678 is a wasteful number, since it uses less digits than its factorization.

2205678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367618.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 2205678 is about 1485.1525174203. The cubic root of 2205678 is about 130.1709388397.

The spelling of 2205678 in words is "two million, two hundred five thousand, six hundred seventy-eight".