420020144 has 20 divisors (see below), whose sum is σ = 814817640. Its totient is φ = 209744640.

The previous prime is 420020131. The next prime is 420020149. The reversal of 420020144 is 441020024.

It is not an unprimeable number, because it can be changed into a prime (420020149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3209 + ... + 29160.

It is an arithmetic number, because the mean of its divisors is an integer number (40740882).

Almost surely, 2^420020144 is an apocalyptic number.

It is an amenable number.

420020144 is a deficient number, since it is larger than the sum of its proper divisors (394797496).

420020144 is a wasteful number, since it uses less digits than its factorization.

420020144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33188 (or 33182 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 420020144 is about 20494.3929893032. The cubic root of 420020144 is about 748.8992112166.

Adding to 420020144 its reverse (441020024), we get a palindrome (861040168).

The spelling of 420020144 in words is "four hundred twenty million, twenty thousand, one hundred forty-four".