423033440 has 192 divisors, whose sum is σ = 1136540160. Its totient is φ = 147947520.

The previous prime is 423033433. The next prime is 423033451. The reversal of 423033440 is 44330324.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2445194 + ... + 2445366.

It is an arithmetic number, because the mean of its divisors is an integer number (5919480).

Almost surely, 2^423033440 is an apocalyptic number.

423033440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 423033440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (568270080).

423033440 is an abundant number, since it is smaller than the sum of its proper divisors (713506720).

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

423033440 is a wasteful number, since it uses less digits than its factorization.

423033440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 23.

The square root of 423033440 is about 20567.7767393562. The cubic root of 423033440 is about 750.6858555746.

Adding to 423033440 its reverse (44330324), we get a palindrome (467363764).

The spelling of 423033440 in words is "four hundred twenty-three million, thirty-three thousand, four hundred forty".