438289 has 4 divisors (see below), whose sum is σ = 442420. Its totient is φ = 434160.

The previous prime is 438287. The next prime is 438301. The reversal of 438289 is 982834.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 982834 = 2 ⋅491417.

It can be written as a sum of positive squares in 2 ways, for example, as 146689 + 291600 = 383^2 + 540^2 .

It is a cyclic number.

It is not a de Polignac number, because 438289 - 2¹ = 438287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (438281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1902 + ... + 2119.

It is an arithmetic number, because the mean of its divisors is an integer number (110605).

2⁴³⁸²⁸⁹ is an apocalyptic number.

It is an amenable number.

438289 is a deficient number, since it is larger than the sum of its proper divisors (4131).

438289 is a wasteful number, since it uses less digits than its factorization.

438289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4130.

The product of its digits is 13824, while the sum is 34.

The square root of 438289 is about 662.0339870430. The cubic root of 438289 is about 75.9603324851.

It can be divided in two parts, 438 and 289, that added together give a palindrome (727).

The spelling of 438289 in words is "four hundred thirty-eight thousand, two hundred eighty-nine".