2128839 has 8 divisors (see below), whose sum is σ = 2885232. Its totient is φ = 1395840.

The previous prime is 2128837. The next prime is 2128849. The reversal of 2128839 is 9388212.

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

It is not a de Polignac number, because 2128839 - 2¹ = 2128837 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2 + 1 + 2¹¹ + 8³ + 8³ + 3¹³ + 9⁶ .

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2128831) 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, 5634 + ... + 5999.

It is an arithmetic number, because the mean of its divisors is an integer number (360654).

2^2128839 is an apocalyptic number.

2128839 is a deficient number, since it is larger than the sum of its proper divisors (756393).

2128839 is a wasteful number, since it uses less digits than its factorization.

2128839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11697.

The product of its digits is 6912, while the sum is 33.

The square root of 2128839 is about 1459.0541456711. The cubic root of 2128839 is about 128.6414537417.

The spelling of 2128839 in words is "two million, one hundred twenty-eight thousand, eight hundred thirty-nine".