128560140 has 36 divisors (see below), whose sum is σ = 389966304. Its totient is φ = 34282656.

The previous prime is 128560121. The next prime is 128560141. The reversal of 128560140 is 41065821.

128560140 is a `hidden beast` number, since 12 + 8 + 5 + 601 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (128560141) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 356932 + ... + 357291.

Almost surely, 2^128560140 is an apocalyptic number.

128560140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128560140 is an abundant number, since it is smaller than the sum of its proper divisors (261406164).

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

128560140 is a wasteful number, since it uses less digits than its factorization.

128560140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714238 (or 714233 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 128560140 is about 11338.4364001391. The cubic root of 128560140 is about 504.7024878979.

It can be divided in two parts, 1285 and 60140, that added together give a triangular number (61425 = T₃₅₀).

The spelling of 128560140 in words is "one hundred twenty-eight million, five hundred sixty thousand, one hundred forty".