438649 has 4 divisors (see below), whose sum is σ = 445264. Its totient is φ = 432036.

The previous prime is 438637. The next prime is 438661. The reversal of 438649 is 946834.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (438637) and next prime (438661).

It is a cyclic number.

It is not a de Polignac number, because 438649 - 2⁷ = 438521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (438049) 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 3 ways as a sum of consecutive naturals, for example, 3207 + ... + 3340.

It is an arithmetic number, because the mean of its divisors is an integer number (111316).

2⁴³⁸⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

438649 is a deficient number, since it is larger than the sum of its proper divisors (6615).

438649 is an equidigital number, since it uses as much as digits as its factorization.

438649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6614.

The product of its digits is 20736, while the sum is 34.

The square root of 438649 is about 662.3058205995. The cubic root of 438649 is about 75.9811241211.

The spelling of 438649 in words is "four hundred thirty-eight thousand, six hundred forty-nine".