2138895387 has 12 divisors (see below), whose sum is σ = 3090516624. Its totient is φ = 1425468240.

The previous prime is 2138895383. The next prime is 2138895403. The reversal of 2138895387 is 7835988312.

2138895387 is a `hidden beast` number, since 21 + 3 + 8 + 89 + 538 + 7 = 666.

It is not a de Polignac number, because 2138895387 - 2² = 2138895383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2138895383) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7903 + ... + 65880.

It is an arithmetic number, because the mean of its divisors is an integer number (257543052).

Almost surely, 2^2138895387 is an apocalyptic number.

2138895387 is a deficient number, since it is larger than the sum of its proper divisors (951621237).

2138895387 is a wasteful number, since it uses less digits than its factorization.

2138895387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77010 (or 77007 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The square root of 2138895387 is about 46248.1933376862. The cubic root of 2138895387 is about 1288.4369802073.

The spelling of 2138895387 in words is "two billion, one hundred thirty-eight million, eight hundred ninety-five thousand, three hundred eighty-seven".