128869760 has 32 divisors (see below), whose sum is σ = 308080800. Its totient is φ = 51547648.

The previous prime is 128869751. The next prime is 128869781. The reversal of 128869760 is 67968821.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 100040 + ... + 101319.

It is an arithmetic number, because the mean of its divisors is an integer number (9627525).

Almost surely, 2^128869760 is an apocalyptic number.

128869760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128869760 is an abundant number, since it is smaller than the sum of its proper divisors (179211040).

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

128869760 is an equidigital number, since it uses as much as digits as its factorization.

128869760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201378 (or 201366 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 128869760 is about 11352.0817474153. The cubic root of 128869760 is about 505.1073326739.

The spelling of 128869760 in words is "one hundred twenty-eight million, eight hundred sixty-nine thousand, seven hundred sixty".