423421344 has 240 divisors, whose sum is σ = 1328231520. Its totient is φ = 132088320.

The previous prime is 423421337. The next prime is 423421357. The reversal of 423421344 is 443124324.

It is a happy number.

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

It is a nude number because it is divisible by every one of its digits.

It is a nialpdrome in base 12.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3232159 + ... + 3232289.

It is an arithmetic number, because the mean of its divisors is an integer number (5534298).

Almost surely, 2^423421344 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 423421344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (664115760).

423421344 is an abundant number, since it is smaller than the sum of its proper divisors (904810176).

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

423421344 is a wasteful number, since it uses less digits than its factorization.

423421344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225 (or 208 counting only the distinct ones).

The product of its digits is 9216, while the sum is 27.

The square root of 423421344 is about 20577.2044748552. The cubic root of 423421344 is about 750.9152346730.

Adding to 423421344 its reverse (443124324), we get a palindrome (866545668).

The spelling of 423421344 in words is "four hundred twenty-three million, four hundred twenty-one thousand, three hundred forty-four".