128757120 has 64 divisors (see below), whose sum is σ = 410419440. Its totient is φ = 34334720.

The previous prime is 128757089. The next prime is 128757137. The reversal of 128757120 is 21757821.

It is a tau number, because it is divible by the number of its divisors (64).

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 7 ways as a sum of consecutive naturals, for example, 31611 + ... + 35450.

Almost surely, 2^128757120 is an apocalyptic number.

128757120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128757120 is an abundant number, since it is smaller than the sum of its proper divisors (281662320).

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

128757120 is an equidigital number, since it uses as much as digits as its factorization.

128757120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67083 (or 67071 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 33.

The square root of 128757120 is about 11347.1194582590. The cubic root of 128757120 is about 504.9601249435.

The spelling of 128757120 in words is "one hundred twenty-eight million, seven hundred fifty-seven thousand, one hundred twenty".