438281 has 2 divisors, whose sum is σ = 438282. Its totient is φ = 438280.

The previous prime is 438271. The next prime is 438287. The reversal of 438281 is 182834.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 265225 + 173056 = 515^2 + 416^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-438281 is a prime.

It is a super-2 number, since 2×438281² = 384180469922, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 438281.

It is not a weakly prime, because it can be changed into another prime (438287) 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 as a sum of consecutive naturals, namely, 219140 + 219141.

It is an arithmetic number, because the mean of its divisors is an integer number (219141).

2⁴³⁸²⁸¹ is an apocalyptic number.

It is an amenable number.

438281 is a deficient number, since it is larger than the sum of its proper divisors (1).

438281 is an equidigital number, since it uses as much as digits as its factorization.

438281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1536, while the sum is 26.

The square root of 438281 is about 662.0279450295. The cubic root of 438281 is about 75.9598703194.

The spelling of 438281 in words is "four hundred thirty-eight thousand, two hundred eighty-one".