420812128 has 24 divisors (see below), whose sum is σ = 903790440. Its totient is φ = 191278080.

The previous prime is 420812123. The next prime is 420812129. The reversal of 420812128 is 821218024.

It is a junction number, because it is equal to n+sod(n) for n = 420812096 and 420812105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420812123) 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 3 ways as a sum of consecutive naturals, for example, 597393 + ... + 598096.

It is an arithmetic number, because the mean of its divisors is an integer number (37657935).

Almost surely, 2^420812128 is an apocalyptic number.

It is an amenable number.

420812128 is an abundant number, since it is smaller than the sum of its proper divisors (482978312).

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

420812128 is a wasteful number, since it uses less digits than its factorization.

420812128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1195510 (or 1195502 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 28.

The square root of 420812128 is about 20513.7058573043. The cubic root of 420812128 is about 749.3696202362.

The spelling of 420812128 in words is "four hundred twenty million, eight hundred twelve thousand, one hundred twenty-eight".