128001860 has 48 divisors (see below), whose sum is σ = 323379840. Its totient is φ = 41575680.

The previous prime is 128001827. The next prime is 128001869. The reversal of 128001860 is 68100821.

It is not an unprimeable number, because it can be changed into a prime (128001869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21401 + ... + 26720.

It is an arithmetic number, because the mean of its divisors is an integer number (6737080).

Almost surely, 2^128001860 is an apocalyptic number.

128001860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128001860 is an abundant number, since it is smaller than the sum of its proper divisors (195377980).

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

128001860 is a wasteful number, since it uses less digits than its factorization.

128001860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48156 (or 48154 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 128001860 is about 11313.7906998495. The cubic root of 128001860 is about 503.9708610432.

The spelling of 128001860 in words is "one hundred twenty-eight million, one thousand, eight hundred sixty".