423438 has 8 divisors (see below), whose sum is σ = 846888. Its totient is φ = 141144.

The previous prime is 423431. The next prime is 423439. The reversal of 423438 is 834324.

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

423438 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423431) 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, 35281 + ... + 35292.

It is an arithmetic number, because the mean of its divisors is an integer number (105861).

2⁴²³⁴³⁸ is an apocalyptic number.

423438 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

423438 is a wasteful number, since it uses less digits than its factorization.

423438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70578.

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

The square root of 423438 is about 650.7211384303. The cubic root of 423438 is about 75.0925080721.

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

The spelling of 423438 in words is "four hundred twenty-three thousand, four hundred thirty-eight".