438217 has 6 divisors (see below), whose sum is σ = 474702. Its totient is φ = 404352.

The previous prime is 438211. The next prime is 438223. The reversal of 438217 is 712834.

It is an interprime number because it is at equal distance from previous prime (438211) and next prime (438223).

It can be written as a sum of positive squares in 3 ways, for example, as 1296 + 436921 = 36^2 + 661^2 .

It is a de Polignac number, because none of the positive numbers 2^k-438217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 438191 and 438200.

It is not an unprimeable number, because it can be changed into a prime (438211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1128 + ... + 1465.

It is an arithmetic number, because the mean of its divisors is an integer number (79117).

2⁴³⁸²¹⁷ is an apocalyptic number.

It is an amenable number.

438217 is a deficient number, since it is larger than the sum of its proper divisors (36485).

438217 is a wasteful number, since it uses less digits than its factorization.

438217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2619 (or 2606 counting only the distinct ones).

The product of its digits is 1344, while the sum is 25.

The square root of 438217 is about 661.9796069366. The cubic root of 438217 is about 75.9561727918.

The spelling of 438217 in words is "four hundred thirty-eight thousand, two hundred seventeen".