2183778 has 12 divisors (see below), whose sum is σ = 4731558. Its totient is φ = 727920.

The previous prime is 2183773. The next prime is 2183789. The reversal of 2183778 is 8773812.

It can be written as a sum of positive squares in only one way, i.e., 1580049 + 603729 = 1257^2 + 777^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2183771) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 60643 + ... + 60678.

2^2183778 is an apocalyptic number.

2183778 is an abundant number, since it is smaller than the sum of its proper divisors (2547780).

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

2183778 is a wasteful number, since it uses less digits than its factorization.

2183778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121329 (or 121326 counting only the distinct ones).

The product of its digits is 18816, while the sum is 36.

The square root of 2183778 is about 1477.7611444344. The cubic root of 2183778 is about 129.7386861285.

The spelling of 2183778 in words is "two million, one hundred eighty-three thousand, seven hundred seventy-eight".