438429 has 8 divisors (see below), whose sum is σ = 594720. Its totient is φ = 287216.

The previous prime is 438419. The next prime is 438439. The reversal of 438429 is 924834.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (438419) and next prime (438439).

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

It is a cyclic number.

It is not a de Polignac number, because 438429 - 2⁷ = 438301 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 438396 and 438405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1062 + ... + 1415.

It is an arithmetic number, because the mean of its divisors is an integer number (74340).

2⁴³⁸⁴²⁹ is an apocalyptic number.

It is an amenable number.

438429 is a deficient number, since it is larger than the sum of its proper divisors (156291).

438429 is a wasteful number, since it uses less digits than its factorization.

438429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2539.

The product of its digits is 6912, while the sum is 30.

The square root of 438429 is about 662.1397133536. The cubic root of 438429 is about 75.9684194737.

The spelling of 438429 in words is "four hundred thirty-eight thousand, four hundred twenty-nine".