423345564 has 36 divisors (see below), whose sum is σ = 1099049224. Its totient is φ = 137300832.

The previous prime is 423345511. The next prime is 423345569. The reversal of 423345564 is 465543324.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423345569) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 157582 + ... + 160245.

Almost surely, 2^423345564 is an apocalyptic number.

It is an amenable number.

423345564 is an abundant number, since it is smaller than the sum of its proper divisors (675703660).

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

423345564 is a wasteful number, since it uses less digits than its factorization.

423345564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317874 (or 317869 counting only the distinct ones).

The product of its digits is 172800, while the sum is 36.

The square root of 423345564 is about 20575.3630344643. The cubic root of 423345564 is about 750.8704347337.

Adding to 423345564 its reverse (465543324), we get a palindrome (888888888).

The spelling of 423345564 in words is "four hundred twenty-three million, three hundred forty-five thousand, five hundred sixty-four".