128403420 has 24 divisors (see below), whose sum is σ = 359529744. Its totient is φ = 34240896.

The previous prime is 128403419. The next prime is 128403469. The reversal of 128403420 is 24304821.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1069969 + ... + 1070088.

It is an arithmetic number, because the mean of its divisors is an integer number (14980406).

Almost surely, 2^128403420 is an apocalyptic number.

128403420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128403420 is an abundant number, since it is smaller than the sum of its proper divisors (231126324).

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

128403420 is a wasteful number, since it uses less digits than its factorization.

128403420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2140069 (or 2140067 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 128403420 is about 11331.5232868313. The cubic root of 128403420 is about 504.4973202710.

The spelling of 128403420 in words is "one hundred twenty-eight million, four hundred three thousand, four hundred twenty".