423630 has 40 divisors (see below), whose sum is σ = 1141272. Its totient is φ = 112752.

The previous prime is 423617. The next prime is 423649. The reversal of 423630 is 36324.

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

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 423630.

It is an unprimeable number.

423630 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 549 + ... + 1071.

2⁴²³⁶³⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 423630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (570636).

423630 is an abundant number, since it is smaller than the sum of its proper divisors (717642).

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

423630 is a wasteful number, since it uses less digits than its factorization.

423630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542 (or 533 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 423630 is about 650.8686503435. The cubic root of 423630 is about 75.1038561190.

Adding to 423630 its reverse (36324), we get a palindrome (459954).

The spelling of 423630 in words is "four hundred twenty-three thousand, six hundred thirty".