420443424 has 36 divisors (see below), whose sum is σ = 1195636806. Its totient is φ = 140147712.

The previous prime is 420443423. The next prime is 420443437. The reversal of 420443424 is 424344024.

It is a happy number.

420443424 is a `hidden beast` number, since 4 + 204 + 434 + 24 = 666.

It can be written as a sum of positive squares in only one way, i.e., 350887824 + 69555600 = 18732^2 + 8340^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (420443423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 729649 + ... + 730224.

Almost surely, 2^420443424 is an apocalyptic number.

It is an amenable number.

420443424 is an abundant number, since it is smaller than the sum of its proper divisors (775193382).

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

420443424 is a wasteful number, since it uses less digits than its factorization.

420443424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1459889 (or 1459878 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 27.

The square root of 420443424 is about 20504.7171158248. The cubic root of 420443424 is about 749.1506972762.

Adding to 420443424 its reverse (424344024), we get a palindrome (844787448).

The spelling of 420443424 in words is "four hundred twenty million, four hundred forty-three thousand, four hundred twenty-four".