420423424 has 18 divisors (see below), whose sum is σ = 839205080. Its totient is φ = 210211584.

The previous prime is 420423347. The next prime is 420423499. The reversal of 420423424 is 424324024.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820884 + ... + 821395.

Almost surely, 2^420423424 is an apocalyptic number.

It is an amenable number.

420423424 is a deficient number, since it is larger than the sum of its proper divisors (418781656).

420423424 is an equidigital number, since it uses as much as digits as its factorization.

420423424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1642295 (or 1642281 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 25.

The square root of 420423424 is about 20504.2294173666. The cubic root of 420423424 is about 749.1388183482.

Adding to 420423424 its reverse (424324024), we get a palindrome (844747448).

The spelling of 420423424 in words is "four hundred twenty million, four hundred twenty-three thousand, four hundred twenty-four".