4388661 has 10 divisors (see below), whose sum is σ = 6556022. Its totient is φ = 2925720.

The previous prime is 4388651. The next prime is 4388689. The reversal of 4388661 is 1668834.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2340900 + 2047761 = 1530^2 + 1431^2 .

It is a de Polignac number, because none of the positive numbers 2^k-4388661 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4388611) by changing a digit.

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 9 ways as a sum of consecutive naturals, for example, 27010 + ... + 27171.

Almost surely, 2^4388661 is an apocalyptic number.

It is an amenable number.

4388661 is a deficient number, since it is larger than the sum of its proper divisors (2167361).

4388661 is an equidigital number, since it uses as much as digits as its factorization.

4388661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54193 (or 54184 counting only the distinct ones).

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

The square root of 4388661 is about 2094.9131246904. The cubic root of 4388661 is about 163.7233711530.

The spelling of 4388661 in words is "four million, three hundred eighty-eight thousand, six hundred sixty-one".