423606 has 16 divisors (see below), whose sum is σ = 897264. Its totient is φ = 132864.

The previous prime is 423601. The next prime is 423617. The reversal of 423606 is 606324.

It is an Ulam 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 (423601) by changing a digit.

423606 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 7 ways as a sum of consecutive naturals, for example, 1975 + ... + 2178.

It is an arithmetic number, because the mean of its divisors is an integer number (56079).

2⁴²³⁶⁰⁶ is an apocalyptic number.

423606 is an abundant number, since it is smaller than the sum of its proper divisors (473658).

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

423606 is a wasteful number, since it uses less digits than its factorization.

423606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4175.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 423606 is about 650.8502131827. The cubic root of 423606 is about 75.1024378007.

The spelling of 423606 in words is "four hundred twenty-three thousand, six hundred six".