423330624 has 140 divisors (see below), whose sum is σ = 1266732544. Its totient is φ = 139781376.

The previous prime is 423330599. The next prime is 423330629. The reversal of 423330624 is 426033324.

It is a happy number.

423330624 is a `hidden beast` number, since 4 + 2 + 3 + 3 + 30 + 624 = 666.

It is a Cunningham number, because it is equal to 20575²-1.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423330629) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 658047 + ... + 658689.

Almost surely, 2^423330624 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 423330624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (633366272).

423330624 is an abundant number, since it is smaller than the sum of its proper divisors (843401920).

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

423330624 is a wasteful number, since it uses less digits than its factorization.

423330624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794 (or 775 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 27.

The square root of 423330624 is about 20574.9999756987. Note that the first 4 decimals coincide. The cubic root of 423330624 is about 750.8616018107.

Adding to 423330624 its reverse (426033324), we get a palindrome (849363948).

The spelling of 423330624 in words is "four hundred twenty-three million, three hundred thirty thousand, six hundred twenty-four".