420243420 has 24 divisors (see below), whose sum is σ = 1176681744. Its totient is φ = 112064896.

The previous prime is 420243377. The next prime is 420243427. The reversal of 420243420 is 24342024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420243427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3501969 + ... + 3502088.

It is an arithmetic number, because the mean of its divisors is an integer number (49028406).

Almost surely, 2^420243420 is an apocalyptic number.

It is an amenable number.

420243420 is an abundant number, since it is smaller than the sum of its proper divisors (756438324).

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

420243420 is a wasteful number, since it uses less digits than its factorization.

420243420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7004069 (or 7004067 counting only the distinct ones).

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

The square root of 420243420 is about 20499.8395115669. The cubic root of 420243420 is about 749.0318886627.

Adding to 420243420 its reverse (24342024), we get a palindrome (444585444).

The spelling of 420243420 in words is "four hundred twenty million, two hundred forty-three thousand, four hundred twenty".