2117738 has 16 divisors (see below), whose sum is σ = 3649344. Its totient is φ = 902880.

The previous prime is 2117729. The next prime is 2117743. The reversal of 2117738 is 8377112.

It is a self number, because there is not a number n which added to its sum of digits gives 2117738.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4406 + ... + 4862.

It is an arithmetic number, because the mean of its divisors is an integer number (228084).

2^2117738 is an apocalyptic number.

2117738 is a deficient number, since it is larger than the sum of its proper divisors (1531606).

2117738 is a wasteful number, since it uses less digits than its factorization.

2117738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797.

The product of its digits is 2352, while the sum is 29.

The square root of 2117738 is about 1455.2449965556. The cubic root of 2117738 is about 128.4174602537.

The spelling of 2117738 in words is "two million, one hundred seventeen thousand, seven hundred thirty-eight".