2138838471 has 96 divisors (see below), whose sum is σ = 4056099840. Its totient is φ = 1061818560.

The previous prime is 2138838463. The next prime is 2138838491. The reversal of 2138838471 is 1748388312.

It is not a de Polignac number, because 2138838471 - 2³ = 2138838463 is a prime.

It is a super-3 number, since 3×2138838471³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2138838491) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1928065 + ... + 1929173.

It is an arithmetic number, because the mean of its divisors is an integer number (42251040).

Almost surely, 2^2138838471 is an apocalyptic number.

2138838471 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2138838471 is a deficient number, since it is larger than the sum of its proper divisors (1917261369).

2138838471 is a wasteful number, since it uses less digits than its factorization.

2138838471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1178 (or 1153 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 2138838471 is about 46247.5780014478. The cubic root of 2138838471 is about 1288.4255516712.

The spelling of 2138838471 in words is "two billion, one hundred thirty-eight million, eight hundred thirty-eight thousand, four hundred seventy-one".