4438991 has 8 divisors (see below), whose sum is σ = 4552704. Its totient is φ = 4326840.

The previous prime is 4438981. The next prime is 4438997. The reversal of 4438991 is 1998344.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4438991 - 2¹⁰ = 4437967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4438997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7010 + ... + 7616.

It is an arithmetic number, because the mean of its divisors is an integer number (569088).

Almost surely, 2^4438991 is an apocalyptic number.

4438991 is a deficient number, since it is larger than the sum of its proper divisors (113713).

4438991 is a wasteful number, since it uses less digits than its factorization.

4438991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781.

The product of its digits is 31104, while the sum is 38.

The square root of 4438991 is about 2106.8913118621. The cubic root of 4438991 is about 164.3468640128.

The spelling of 4438991 in words is "four million, four hundred thirty-eight thousand, nine hundred ninety-one".