423432 has 24 divisors (see below), whose sum is σ = 1146990. Its totient is φ = 141120.

The previous prime is 423431. The next prime is 423439. The reversal of 423432 is 234324.

It can be written as a sum of positive squares in only one way, i.e., 298116 + 125316 = 546^2 + 354^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

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 5 ways as a sum of consecutive naturals, for example, 2869 + ... + 3012.

2⁴²³⁴³² is an apocalyptic number.

It is an amenable number.

423432 is an abundant number, since it is smaller than the sum of its proper divisors (723558).

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

423432 is a wasteful number, since it uses less digits than its factorization.

423432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5893 (or 5886 counting only the distinct ones).

The product of its digits is 576, while the sum is 18.

The square root of 423432 is about 650.7165281442. The cubic root of 423432 is about 75.0921533903.

Adding to 423432 its reverse (234324), we get a palindrome (657756).

It can be divided in two parts, 4 and 23432, that added together give a triangular number (23436 = T₂₁₆).

The spelling of 423432 in words is "four hundred twenty-three thousand, four hundred thirty-two".