438561 has 16 divisors (see below), whose sum is σ = 668800. Its totient is φ = 283824.

The previous prime is 438551. The next prime is 438569. The reversal of 438561 is 165834.

It is not a de Polignac number, because 438561 - 2⁹ = 438049 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (438569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 780 + ... + 1218.

It is an arithmetic number, because the mean of its divisors is an integer number (41800).

2⁴³⁸⁵⁶¹ is an apocalyptic number.

It is an amenable number.

438561 is a deficient number, since it is larger than the sum of its proper divisors (230239).

438561 is a wasteful number, since it uses less digits than its factorization.

438561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485 (or 479 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 438561 is about 662.2393827008. The cubic root of 438561 is about 75.9760427720.

It can be divided in two parts, 438 and 561, that added together give a palindrome (999).

The spelling of 438561 in words is "four hundred thirty-eight thousand, five hundred sixty-one".