423866646 has 48 divisors (see below), whose sum is σ = 1053371904. Its totient is φ = 120666672.

The previous prime is 423866603. The next prime is 423866647. The reversal of 423866646 is 646668324.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423866647) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 29715 + ... + 41601.

It is an arithmetic number, because the mean of its divisors is an integer number (21945248).

Almost surely, 2^423866646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 423866646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (526685952).

423866646 is an abundant number, since it is smaller than the sum of its proper divisors (629505258).

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

423866646 is a wasteful number, since it uses less digits than its factorization.

423866646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12185 (or 12182 counting only the distinct ones).

The product of its digits is 995328, while the sum is 45.

The square root of 423866646 is about 20588.0219059530. The cubic root of 423866646 is about 751.1783822507.

The spelling of 423866646 in words is "four hundred twenty-three million, eight hundred sixty-six thousand, six hundred forty-six".