423646 has 8 divisors (see below), whose sum is σ = 656064. Its totient is φ = 204960.

The previous prime is 423617. The next prime is 423649. The reversal of 423646 is 646324.

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

It is a self number, because there is not a number n which added to its sum of digits gives 423646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423649) by changing a digit.

423646 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3355 + ... + 3478.

It is an arithmetic number, because the mean of its divisors is an integer number (82008).

2⁴²³⁶⁴⁶ is an apocalyptic number.

423646 is a deficient number, since it is larger than the sum of its proper divisors (232418).

423646 is a wasteful number, since it uses less digits than its factorization.

423646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6866.

The product of its digits is 3456, while the sum is 25.

The square root of 423646 is about 650.8809414939. The cubic root of 423646 is about 75.1048016348.

The spelling of 423646 in words is "four hundred twenty-three thousand, six hundred forty-six".