420189528 has 64 divisors (see below), whose sum is σ = 1148152320. Its totient is φ = 127088000.

The previous prime is 420189521. The next prime is 420189529. The reversal of 420189528 is 825981024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420189521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 177553 + ... + 179903.

It is an arithmetic number, because the mean of its divisors is an integer number (17939880).

Almost surely, 2^420189528 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 420189528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (574076160).

420189528 is an abundant number, since it is smaller than the sum of its proper divisors (727962792).

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

420189528 is a wasteful number, since it uses less digits than its factorization.

420189528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3048 (or 3044 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 420189528 is about 20498.5250201082. The cubic root of 420189528 is about 748.9998686871. Note that the first 3 decimals are identical.

The spelling of 420189528 in words is "four hundred twenty million, one hundred eighty-nine thousand, five hundred twenty-eight".