438665 has 8 divisors (see below), whose sum is σ = 535680. Its totient is φ = 344752.

The previous prime is 438661. The next prime is 438667. The reversal of 438665 is 566834.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 438665 - 2² = 438661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (438661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 449 + ... + 1038.

It is an arithmetic number, because the mean of its divisors is an integer number (66960).

2⁴³⁸⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

438665 is a deficient number, since it is larger than the sum of its proper divisors (97015).

438665 is a wasteful number, since it uses less digits than its factorization.

438665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1551.

The product of its digits is 17280, while the sum is 32.

The square root of 438665 is about 662.3178995014. The cubic root of 438665 is about 75.9820479297.

The spelling of 438665 in words is "four hundred thirty-eight thousand, six hundred sixty-five".