4391289 has 24 divisors (see below), whose sum is σ = 7422272. Its totient is φ = 2449440.

The previous prime is 4391263. The next prime is 4391323. The reversal of 4391289 is 9821934.

It is not a de Polignac number, because 4391289 - 2⁷ = 4391161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4391249) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1899 + ... + 3519.

Almost surely, 2^4391289 is an apocalyptic number.

It is an amenable number.

4391289 is a deficient number, since it is larger than the sum of its proper divisors (3030983).

4391289 is a wasteful number, since it uses less digits than its factorization.

4391289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1677 (or 1674 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 4391289 is about 2095.5402644664. The cubic root of 4391289 is about 163.7560446849.

It can be divided in two parts, 439 and 1289, that added together give a cube (1728 = 12³).

The spelling of 4391289 in words is "four million, three hundred ninety-one thousand, two hundred eighty-nine".