423022440 has 64 divisors (see below), whose sum is σ = 1324252800. Its totient is φ = 107900672.

The previous prime is 423022399. The next prime is 423022447. The reversal of 423022440 is 44220324.

It is not an unprimeable number, because it can be changed into a prime (423022447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73875 + ... + 79394.

It is an arithmetic number, because the mean of its divisors is an integer number (20691450).

Almost surely, 2^423022440 is an apocalyptic number.

423022440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

423022440 is an abundant number, since it is smaller than the sum of its proper divisors (901230360).

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

423022440 is a wasteful number, since it uses less digits than its factorization.

423022440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153306 (or 153302 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 423022440 is about 20567.5093290364. The cubic root of 423022440 is about 750.6793489054.

Adding to 423022440 its reverse (44220324), we get a palindrome (467242764).

The spelling of 423022440 in words is "four hundred twenty-three million, twenty-two thousand, four hundred forty".