423143440 has 40 divisors (see below), whose sum is σ = 985258368. Its totient is φ = 169008000.

The previous prime is 423143423. The next prime is 423143453. The reversal of 423143440 is 44341324.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56559 + ... + 63601.

Almost surely, 2^423143440 is an apocalyptic number.

423143440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

423143440 is an abundant number, since it is smaller than the sum of its proper divisors (562114928).

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

423143440 is a wasteful number, since it uses less digits than its factorization.

423143440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7807 (or 7801 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 423143440 is about 20570.4506513591. The cubic root of 423143440 is about 750.7509160640.

Adding to 423143440 its reverse (44341324), we get a palindrome (467484764).

It can be divided in two parts, 42314 and 3440, that added together give a palindrome (45754).

The spelling of 423143440 in words is "four hundred twenty-three million, one hundred forty-three thousand, four hundred forty".