128317884 has 12 divisors (see below), whose sum is σ = 299408424. Its totient is φ = 42772624.

The previous prime is 128317859. The next prime is 128317901. The reversal of 128317884 is 488713821.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5346567 + ... + 5346590.

It is an arithmetic number, because the mean of its divisors is an integer number (24950702).

Almost surely, 2^128317884 is an apocalyptic number.

It is an amenable number.

128317884 is an abundant number, since it is smaller than the sum of its proper divisors (171090540).

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

128317884 is a wasteful number, since it uses less digits than its factorization.

128317884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10693164 (or 10693162 counting only the distinct ones).

The product of its digits is 86016, while the sum is 42.

The square root of 128317884 is about 11327.7484082231. The cubic root of 128317884 is about 504.3852716761.

The spelling of 128317884 in words is "one hundred twenty-eight million, three hundred seventeen thousand, eight hundred eighty-four".