420220144 has 40 divisors (see below), whose sum is σ = 863516160. Its totient is φ = 197419008.

The previous prime is 420220139. The next prime is 420220147. The reversal of 420220144 is 441022024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420220147) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 251857 + ... + 253519.

It is an arithmetic number, because the mean of its divisors is an integer number (21587904).

Almost surely, 2^420220144 is an apocalyptic number.

It is an amenable number.

420220144 is an abundant number, since it is smaller than the sum of its proper divisors (443296016).

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

420220144 is a wasteful number, since it uses less digits than its factorization.

420220144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2617 (or 2611 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 420220144 is about 20499.2717919442. The cubic root of 420220144 is about 749.0180595442.

Adding to 420220144 its reverse (441022024), we get a palindrome (861242168).

The spelling of 420220144 in words is "four hundred twenty million, two hundred twenty thousand, one hundred forty-four".