2138168 has 8 divisors (see below), whose sum is σ = 4009080. Its totient is φ = 1069080.

The previous prime is 2138167. The next prime is 2138189. The reversal of 2138168 is 8618312.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 2138168.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2138167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133628 + ... + 133643.

It is an arithmetic number, because the mean of its divisors is an integer number (501135).

2^2138168 is an apocalyptic number.

It is an amenable number.

2138168 is a deficient number, since it is larger than the sum of its proper divisors (1870912).

2138168 is a wasteful number, since it uses less digits than its factorization.

2138168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267277 (or 267273 counting only the distinct ones).

The product of its digits is 2304, while the sum is 29.

The square root of 2138168 is about 1462.2475850553. The cubic root of 2138168 is about 128.8290908147.

The spelling of 2138168 in words is "two million, one hundred thirty-eight thousand, one hundred sixty-eight".