2183878388 has 6 divisors (see below), whose sum is σ = 3821787186. Its totient is φ = 1091939192.

The previous prime is 2183878381. The next prime is 2183878391. The reversal of 2183878388 is 8838783812.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1718268304 + 465610084 = 41452^2 + 21578^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2183878381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272984795 + ... + 272984802.

It is an arithmetic number, because the mean of its divisors is an integer number (636964531).

Almost surely, 2^2183878388 is an apocalyptic number.

It is an amenable number.

2183878388 is a deficient number, since it is larger than the sum of its proper divisors (1637908798).

2183878388 is a wasteful number, since it uses less digits than its factorization.

2183878388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545969601 (or 545969599 counting only the distinct ones).

The product of its digits is 4128768, while the sum is 56.

The square root of 2183878388 is about 46731.9846357931. The cubic root of 2183878388 is about 1297.4067412178.

The spelling of 2183878388 in words is "two billion, one hundred eighty-three million, eight hundred seventy-eight thousand, three hundred eighty-eight".