438109 has 6 divisors (see below), whose sum is σ = 509694. Its totient is φ = 375480.

The previous prime is 438091. The next prime is 438131. The reversal of 438109 is 901834.

It can be written as a sum of positive squares in only one way, i.e., 396900 + 41209 = 630^2 + 203^2 .

It is not a de Polignac number, because 438109 - 2¹¹ = 436061 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4422 + ... + 4519.

It is an arithmetic number, because the mean of its divisors is an integer number (84949).

2⁴³⁸¹⁰⁹ is an apocalyptic number.

438109 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

438109 is a deficient number, since it is larger than the sum of its proper divisors (71585).

438109 is an equidigital number, since it uses as much as digits as its factorization.

438109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8955 (or 8948 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 438109 is about 661.8980284001. The cubic root of 438109 is about 75.9499323975.

The spelling of 438109 in words is "four hundred thirty-eight thousand, one hundred nine".