2117638 has 12 divisors (see below), whose sum is σ = 3292380. Its totient is φ = 1021496.

The previous prime is 2117623. The next prime is 2117651. The reversal of 2117638 is 8367112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1053 + ... + 2311.

It is an arithmetic number, because the mean of its divisors is an integer number (274365).

2^2117638 is an apocalyptic number.

2117638 is a deficient number, since it is larger than the sum of its proper divisors (1174742).

2117638 is a wasteful number, since it uses less digits than its factorization.

2117638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1319 (or 1290 counting only the distinct ones).

The product of its digits is 2016, while the sum is 28.

The square root of 2117638 is about 1455.2106376741. The cubic root of 2117638 is about 128.4154389228.

The spelling of 2117638 in words is "two million, one hundred seventeen thousand, six hundred thirty-eight".