128838983 has 24 divisors (see below), whose sum is σ = 162236592. Its totient is φ = 101412864.

The previous prime is 128838979. The next prime is 128839001. The reversal of 128838983 is 389838821.

It is not a de Polignac number, because 128838983 - 2² = 128838979 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128838973) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 163316 + ... + 164102.

It is an arithmetic number, because the mean of its divisors is an integer number (6759858).

Almost surely, 2^128838983 is an apocalyptic number.

128838983 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

128838983 is a deficient number, since it is larger than the sum of its proper divisors (33397609).

128838983 is a wasteful number, since it uses less digits than its factorization.

128838983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071 (or 1064 counting only the distinct ones).

The product of its digits is 663552, while the sum is 50.

The square root of 128838983 is about 11350.7261001224. The cubic root of 128838983 is about 505.0671191382.

The spelling of 128838983 in words is "one hundred twenty-eight million, eight hundred thirty-eight thousand, nine hundred eighty-three".