2138260808 has 8 divisors (see below), whose sum is σ = 4009239030. Its totient is φ = 1069130400.

The previous prime is 2138260783. The next prime is 2138260811. The reversal of 2138260808 is 8080628312.

It can be written as a sum of positive squares in only one way, i.e., 1907767684 + 230493124 = 43678^2 + 15182^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133641293 + ... + 133641308.

Almost surely, 2^2138260808 is an apocalyptic number.

It is an amenable number.

2138260808 is a deficient number, since it is larger than the sum of its proper divisors (1870978222).

2138260808 is a wasteful number, since it uses less digits than its factorization.

2138260808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267282607 (or 267282603 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 2138260808 is about 46241.3322472439. The cubic root of 2138260808 is about 1288.3095474638.

The spelling of 2138260808 in words is "two billion, one hundred thirty-eight million, two hundred sixty thousand, eight hundred eight".