438431 has 4 divisors (see below), whose sum is σ = 501072. Its totient is φ = 375792.

The previous prime is 438419. The next prime is 438439. The reversal of 438431 is 134834.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-438431 is a prime.

It is a super-2 number, since 2×438431² = 384443483522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 438397 and 438406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438439) 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 3 ways as a sum of consecutive naturals, for example, 31310 + ... + 31323.

It is an arithmetic number, because the mean of its divisors is an integer number (125268).

2⁴³⁸⁴³¹ is an apocalyptic number.

438431 is a deficient number, since it is larger than the sum of its proper divisors (62641).

438431 is an equidigital number, since it uses as much as digits as its factorization.

438431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62640.

The product of its digits is 1152, while the sum is 23.

The square root of 438431 is about 662.1412236072. The cubic root of 438431 is about 75.9685349896.

The spelling of 438431 in words is "four hundred thirty-eight thousand, four hundred thirty-one".