4188861 has 16 divisors (see below), whose sum is σ = 6249600. Its totient is φ = 2772864.

The previous prime is 4188857. The next prime is 4188869. The reversal of 4188861 is 1688814.

It is not a de Polignac number, because 4188861 - 2² = 4188857 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4188869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4045 + ... + 4973.

It is an arithmetic number, because the mean of its divisors is an integer number (390600).

Almost surely, 2^4188861 is an apocalyptic number.

It is an amenable number.

4188861 is a deficient number, since it is larger than the sum of its proper divisors (2060739).

4188861 is a wasteful number, since it uses less digits than its factorization.

4188861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1105 (or 1099 counting only the distinct ones).

The product of its digits is 12288, while the sum is 36.

The square root of 4188861 is about 2046.6707111795. The cubic root of 4188861 is about 161.2001035451.

The spelling of 4188861 in words is "four million, one hundred eighty-eight thousand, eight hundred sixty-one".