2117888 has 18 divisors (see below), whose sum is σ = 4228014. Its totient is φ = 1058816.

The previous prime is 2117887. The next prime is 2117893. The reversal of 2117888 is 8887112.

It can be written as a sum of positive squares in only one way, i.e., 1982464 + 135424 = 1408^2 + 368^2 .

It is not an unprimeable number, because it can be changed into a prime (2117887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3881 + ... + 4392.

2^2117888 is an apocalyptic number.

It is an amenable number.

2117888 is a deficient number, since it is larger than the sum of its proper divisors (2110126).

2117888 is an frugal number, since it uses more digits than its factorization.

2117888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8289 (or 8275 counting only the distinct ones).

The product of its digits is 7168, while the sum is 35.

The square root of 2117888 is about 1455.2965333567. The cubic root of 2117888 is about 128.4204921309.

The spelling of 2117888 in words is "two million, one hundred seventeen thousand, eight hundred eighty-eight".