438423 has 4 divisors (see below), whose sum is σ = 584568. Its totient is φ = 292280.

The previous prime is 438419. The next prime is 438439. The reversal of 438423 is 324834.

438423 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

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 438423 - 2² = 438419 is a prime.

It is an Ulam number.

It is a D-number.

438423 is strictly pandigital in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 438393 and 438402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438443) 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, 73068 + ... + 73073.

It is an arithmetic number, because the mean of its divisors is an integer number (146142).

2⁴³⁸⁴²³ is an apocalyptic number.

438423 is a deficient number, since it is larger than the sum of its proper divisors (146145).

438423 is a wasteful number, since it uses less digits than its factorization.

438423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146144.

The product of its digits is 2304, while the sum is 24.

The square root of 438423 is about 662.1351825723. The cubic root of 438423 is about 75.9680729238.

It can be divided in two parts, 438 and 423, that added together give a triangular number (861 = T₄₁).

The spelling of 438423 in words is "four hundred thirty-eight thousand, four hundred twenty-three".