438545 has 8 divisors (see below), whose sum is σ = 530880. Its totient is φ = 347760.

The previous prime is 438533. The next prime is 438551. The reversal of 438545 is 545834.

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

It is not a de Polignac number, because 438545 - 2¹⁸ = 176401 is a prime.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 380 + ... + 1010.

It is an arithmetic number, because the mean of its divisors is an integer number (66360).

2⁴³⁸⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

438545 is a deficient number, since it is larger than the sum of its proper divisors (92335).

438545 is a wasteful number, since it uses less digits than its factorization.

438545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775.

The product of its digits is 9600, while the sum is 29.

The square root of 438545 is about 662.2273023668. The cubic root of 438545 is about 75.9751188173.

Subtracting from 438545 its sum of digits (29), we obtain a triangular number (438516 = T₉₃₆).

The spelling of 438545 in words is "four hundred thirty-eight thousand, five hundred forty-five".