128128983 has 16 divisors (see below), whose sum is σ = 186725376. Its totient is φ = 77800320.

The previous prime is 128128963. The next prime is 128128999. The reversal of 128128983 is 389821821.

It is not a de Polignac number, because 128128983 - 2⁶ = 128128919 is a prime.

It is a super-2 number, since 2×128128983² = 32834072569228578, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128128933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38941 + ... + 42102.

It is an arithmetic number, because the mean of its divisors is an integer number (11670336).

Almost surely, 2^128128983 is an apocalyptic number.

128128983 is a deficient number, since it is larger than the sum of its proper divisors (58596393).

128128983 is a wasteful number, since it uses less digits than its factorization.

128128983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81094.

The product of its digits is 55296, while the sum is 42.

The square root of 128128983 is about 11319.4073608118. The cubic root of 128128983 is about 504.1376427099.

The spelling of 128128983 in words is "one hundred twenty-eight million, one hundred twenty-eight thousand, nine hundred eighty-three".