438645 has 8 divisors (see below), whose sum is σ = 701856. Its totient is φ = 233936.

The previous prime is 438637. The next prime is 438661. The reversal of 438645 is 546834.

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 438645 - 2³ = 438637 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 14607 + ... + 14636.

It is an arithmetic number, because the mean of its divisors is an integer number (87732).

2⁴³⁸⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

438645 is a deficient number, since it is larger than the sum of its proper divisors (263211).

438645 is a wasteful number, since it uses less digits than its factorization.

438645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29251.

The product of its digits is 11520, while the sum is 30.

The square root of 438645 is about 662.3028008396. The cubic root of 438645 is about 75.9808931654.

The spelling of 438645 in words is "four hundred thirty-eight thousand, six hundred forty-five".