4138668 has 24 divisors (see below), whose sum is σ = 10730160. Its totient is φ = 1379520.

The previous prime is 4138649. The next prime is 4138681. The reversal of 4138668 is 8668314.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19053 + ... + 19268.

It is an arithmetic number, because the mean of its divisors is an integer number (447090).

Almost surely, 2^4138668 is an apocalyptic number.

It is an amenable number.

4138668 is an abundant number, since it is smaller than the sum of its proper divisors (6591492).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4138668 is a wasteful number, since it uses less digits than its factorization.

4138668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38334 (or 38326 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 4138668 is about 2034.3716474627. The cubic root of 4138668 is about 160.5536548711.

The spelling of 4138668 in words is "four million, one hundred thirty-eight thousand, six hundred sixty-eight".