2183278 has 4 divisors (see below), whose sum is σ = 3274920. Its totient is φ = 1091638.

The previous prime is 2183261. The next prime is 2183281. The reversal of 2183278 is 8723812.

2183278 is nontrivially palindromic in base 9.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between even and odd.

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, 545818 + ... + 545821.

It is an arithmetic number, because the mean of its divisors is an integer number (818730).

2^2183278 is an apocalyptic number.

2183278 is a deficient number, since it is larger than the sum of its proper divisors (1091642).

2183278 is a wasteful number, since it uses less digits than its factorization.

2183278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091641.

The product of its digits is 5376, while the sum is 31.

The square root of 2183278 is about 1477.5919599132. The cubic root of 2183278 is about 129.7287836729.

The spelling of 2183278 in words is "two million, one hundred eighty-three thousand, two hundred seventy-eight".