2138895386 has 8 divisors (see below), whose sum is σ = 3209506740. Its totient is φ = 1069059808.

The previous prime is 2138895383. The next prime is 2138895403. The reversal of 2138895386 is 6835988312.

It can be written as a sum of positive squares in 2 ways, for example, as 1563807025 + 575088361 = 39545^2 + 23981^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 187001 + ... + 198108.

Almost surely, 2^2138895386 is an apocalyptic number.

2138895386 is a deficient number, since it is larger than the sum of its proper divisors (1070611354).

2138895386 is a wasteful number, since it uses less digits than its factorization.

2138895386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387888.

The product of its digits is 2488320, while the sum is 53.

The square root of 2138895386 is about 46248.1933268749. The cubic root of 2138895386 is about 1288.4369800065.

The spelling of 2138895386 in words is "two billion, one hundred thirty-eight million, eight hundred ninety-five thousand, three hundred eighty-six".