2138488871 has 8 divisors (see below), whose sum is σ = 2362729824. Its totient is φ = 1925186560.

The previous prime is 2138488867. The next prime is 2138488879. The reversal of 2138488871 is 1788848312.

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

It is a cyclic number.

It is not a de Polignac number, because 2138488871 - 2² = 2138488867 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2138488879) 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, 2734250 + ... + 2735031.

It is an arithmetic number, because the mean of its divisors is an integer number (295341228).

Almost surely, 2^2138488871 is an apocalyptic number.

2138488871 is a deficient number, since it is larger than the sum of its proper divisors (224240953).

2138488871 is a wasteful number, since it uses less digits than its factorization.

2138488871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5469321.

The product of its digits is 688128, while the sum is 50.

The square root of 2138488871 is about 46243.7981895951. The cubic root of 2138488871 is about 1288.3553487514.

The spelling of 2138488871 in words is "two billion, one hundred thirty-eight million, four hundred eighty-eight thousand, eight hundred seventy-one".