423643612 has 18 divisors (see below), whose sum is σ = 862417752. Its totient is φ = 181561464.

The previous prime is 423643609. The next prime is 423643639. The reversal of 423643612 is 216346324.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1080528 + ... + 1080919.

Almost surely, 2^423643612 is an apocalyptic number.

It is an amenable number.

423643612 is an abundant number, since it is smaller than the sum of its proper divisors (438774140).

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

423643612 is a wasteful number, since it uses less digits than its factorization.

423643612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2161465 (or 2161456 counting only the distinct ones).

The product of its digits is 20736, while the sum is 31.

The square root of 423643612 is about 20582.6045970863. The cubic root of 423643612 is about 751.0466051811.

Adding to 423643612 its reverse (216346324), we get a palindrome (639989936).

The spelling of 423643612 in words is "four hundred twenty-three million, six hundred forty-three thousand, six hundred twelve".