2205878 has 4 divisors (see below), whose sum is σ = 3308820. Its totient is φ = 1102938.

The previous prime is 2205839. The next prime is 2205883. The reversal of 2205878 is 8785022.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 551468 + ... + 551471.

It is an arithmetic number, because the mean of its divisors is an integer number (827205).

2^2205878 is an apocalyptic number.

2205878 is a deficient number, since it is larger than the sum of its proper divisors (1102942).

2205878 is a wasteful number, since it uses less digits than its factorization.

2205878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1102941.

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 2205878 is about 1485.2198490459. The cubic root of 2205878 is about 130.1748731403.

The spelling of 2205878 in words is "two million, two hundred five thousand, eight hundred seventy-eight".