438635 has 8 divisors (see below), whose sum is σ = 540816. Its totient is φ = 341280.

The previous prime is 438631. The next prime is 438637. The reversal of 438635 is 536834.

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

It is not a de Polignac number, because 438635 - 2² = 438631 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 438598 and 438607.

It is not an unprimeable number, because it can be changed into a prime (438631) 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 7 ways as a sum of consecutive naturals, for example, 1001 + ... + 1370.

It is an arithmetic number, because the mean of its divisors is an integer number (67602).

2⁴³⁸⁶³⁵ is an apocalyptic number.

438635 is a deficient number, since it is larger than the sum of its proper divisors (102181).

438635 is a wasteful number, since it uses less digits than its factorization.

438635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2413.

The product of its digits is 8640, while the sum is 29.

The square root of 438635 is about 662.2952513796. The cubic root of 438635 is about 75.9803157701.

The spelling of 438635 in words is "four hundred thirty-eight thousand, six hundred thirty-five".