438257 has 4 divisors (see below), whose sum is σ = 446580. Its totient is φ = 429936.

The previous prime is 438253. The next prime is 438259. The reversal of 438257 is 752834.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 752834 = 2 ⋅376417.

It can be written as a sum of positive squares in 2 ways, for example, as 364816 + 73441 = 604^2 + 271^2 .

It is not a de Polignac number, because 438257 - 2² = 438253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (438253) 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 3 ways as a sum of consecutive naturals, for example, 4082 + ... + 4187.

It is an arithmetic number, because the mean of its divisors is an integer number (111645).

2⁴³⁸²⁵⁷ is an apocalyptic number.

It is an amenable number.

438257 is a deficient number, since it is larger than the sum of its proper divisors (8323).

438257 is an equidigital number, since it uses as much as digits as its factorization.

438257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8322.

The product of its digits is 6720, while the sum is 29.

The square root of 438257 is about 662.0098186583. The cubic root of 438257 is about 75.9584837888.

The spelling of 438257 in words is "four hundred thirty-eight thousand, two hundred fifty-seven".