4388891 has 4 divisors (see below), whose sum is σ = 4726512. Its totient is φ = 4051272.

The previous prime is 4388869. The next prime is 4388897. The reversal of 4388891 is 1988834.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1988834 = 2 ⋅994417.

It is a cyclic number.

It is not a de Polignac number, because 4388891 - 2⁶ = 4388827 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 (4388897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168791 + ... + 168816.

It is an arithmetic number, because the mean of its divisors is an integer number (1181628).

Almost surely, 2^4388891 is an apocalyptic number.

4388891 is a deficient number, since it is larger than the sum of its proper divisors (337621).

4388891 is a wasteful number, since it uses less digits than its factorization.

4388891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337620.

The product of its digits is 55296, while the sum is 41.

The square root of 4388891 is about 2094.9680188490. The cubic root of 4388891 is about 163.7262312295.

The spelling of 4388891 in words is "four million, three hundred eighty-eight thousand, eight hundred ninety-one".