128404860 has 48 divisors (see below), whose sum is σ = 375169536. Its totient is φ = 32752192.

The previous prime is 128404853. The next prime is 128404873. The reversal of 128404860 is 68404821.

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 15 ways as a sum of consecutive naturals, for example, 45144 + ... + 47903.

It is an arithmetic number, because the mean of its divisors is an integer number (7816032).

Almost surely, 2^128404860 is an apocalyptic number.

128404860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128404860 is an abundant number, since it is smaller than the sum of its proper divisors (246764676).

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

128404860 is a wasteful number, since it uses less digits than its factorization.

128404860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93082 (or 93080 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 128404860 is about 11331.5868262128. The cubic root of 128404860 is about 504.4992061850.

The spelling of 128404860 in words is "one hundred twenty-eight million, four hundred four thousand, eight hundred sixty".