128001708 has 144 divisors (see below), whose sum is σ = 366912000. Its totient is φ = 38864448.

The previous prime is 128001661. The next prime is 128001719. The reversal of 128001708 is 807100821.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 47 ways as a sum of consecutive naturals, for example, 535453 + ... + 535691.

It is an arithmetic number, because the mean of its divisors is an integer number (2548000).

Almost surely, 2^128001708 is an apocalyptic number.

128001708 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128001708, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183456000).

128001708 is an abundant number, since it is smaller than the sum of its proper divisors (238910292).

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

128001708 is a wasteful number, since it uses less digits than its factorization.

128001708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306 (or 292 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 128001708 is about 11313.7839823818. The cubic root of 128001708 is about 503.9706615575.

The spelling of 128001708 in words is "one hundred twenty-eight million, one thousand, seven hundred eight".