2149638 has 8 divisors (see below), whose sum is σ = 4299288. Its totient is φ = 716544.

The previous prime is 2149621. The next prime is 2149661. The reversal of 2149638 is 8369412.

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

2149638 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 = 2149599 and 2149608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179131 + ... + 179142.

It is an arithmetic number, because the mean of its divisors is an integer number (537411).

2^2149638 is an apocalyptic number.

2149638 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.

2149638 is a wasteful number, since it uses less digits than its factorization.

2149638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358278.

The product of its digits is 10368, while the sum is 33.

The square root of 2149638 is about 1466.1643836896. The cubic root of 2149638 is about 129.0590439405.

The spelling of 2149638 in words is "two million, one hundred forty-nine thousand, six hundred thirty-eight".