2129838 has 8 divisors (see below), whose sum is σ = 4259688. Its totient is φ = 709944.

The previous prime is 2129837. The next prime is 2129849. The reversal of 2129838 is 8389212.

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

2129838 is an admirable number.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2129799 and 2129808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2129837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177481 + ... + 177492.

It is an arithmetic number, because the mean of its divisors is an integer number (532461).

2^2129838 is an apocalyptic number.

2129838 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2129838 is a wasteful number, since it uses less digits than its factorization.

2129838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354978.

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

The square root of 2129838 is about 1459.3964505918. The cubic root of 2129838 is about 128.6615731143.

The spelling of 2129838 in words is "two million, one hundred twenty-nine thousand, eight hundred thirty-eight".