2138884066 has 16 divisors (see below), whose sum is σ = 3501499680. Its totient is φ = 971801280.

The previous prime is 2138884061. The next prime is 2138884073. The reversal of 2138884066 is 6604888312.

It is not an unprimeable number, because it can be changed into a prime (2138884061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34570 + ... + 73978.

It is an arithmetic number, because the mean of its divisors is an integer number (218843730).

Almost surely, 2^2138884066 is an apocalyptic number.

2138884066 is a deficient number, since it is larger than the sum of its proper divisors (1362615614).

2138884066 is a wasteful number, since it uses less digits than its factorization.

2138884066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41889.

The product of its (nonzero) digits is 442368, while the sum is 46.

The square root of 2138884066 is about 46248.0709435540. The cubic root of 2138884066 is about 1288.4347070058.

The spelling of 2138884066 in words is "two billion, one hundred thirty-eight million, eight hundred eighty-four thousand, sixty-six".