438709 has 8 divisors (see below), whose sum is σ = 459648. Its totient is φ = 418320.

The previous prime is 438707. The next prime is 438721. The reversal of 438709 is 907834.

It is a happy number.

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 438709 - 2¹ = 438707 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438701) 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 7 ways as a sum of consecutive naturals, for example, 2544 + ... + 2710.

It is an arithmetic number, because the mean of its divisors is an integer number (57456).

2⁴³⁸⁷⁰⁹ is an apocalyptic number.

It is an amenable number.

438709 is a deficient number, since it is larger than the sum of its proper divisors (20939).

438709 is a wasteful number, since it uses less digits than its factorization.

438709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 438709 is about 662.3511153459. The cubic root of 438709 is about 75.9845882877.

The spelling of 438709 in words is "four hundred thirty-eight thousand, seven hundred nine".