420550144 has 60 divisors (see below), whose sum is σ = 977525604. Its totient is φ = 180225024.

The previous prime is 420550139. The next prime is 420550157. The reversal of 420550144 is 441055024.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16707 + ... + 33469.

Almost surely, 2^420550144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 420550144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (488762802).

420550144 is an abundant number, since it is smaller than the sum of its proper divisors (556975460).

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

420550144 is an equidigital number, since it uses as much as digits as its factorization.

420550144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16795 (or 16772 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 420550144 is about 20507.3192787356. The cubic root of 420550144 is about 749.2140768689.

It can be divided in two parts, 420 and 550144, that added together give a square (550564 = 742²).

The spelling of 420550144 in words is "four hundred twenty million, five hundred fifty thousand, one hundred forty-four".