438427 has 4 divisors (see below), whose sum is σ = 478296. Its totient is φ = 398560.

The previous prime is 438419. The next prime is 438439. The reversal of 438427 is 724834.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 438427 - 2³ = 438419 is a prime.

It is a Duffinian number.

438427 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 438395 and 438404.

It is not an unprimeable number, because it can be changed into a prime (438467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19918 + ... + 19939.

It is an arithmetic number, because the mean of its divisors is an integer number (119574).

2⁴³⁸⁴²⁷ is an apocalyptic number.

438427 is a deficient number, since it is larger than the sum of its proper divisors (39869).

438427 is a wasteful number, since it uses less digits than its factorization.

438427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39868.

The product of its digits is 5376, while the sum is 28.

The square root of 438427 is about 662.1382030966. The cubic root of 438427 is about 75.9683039574.

The spelling of 438427 in words is "four hundred thirty-eight thousand, four hundred twenty-seven".