128122938 has 32 divisors (see below), whose sum is σ = 293905920. Its totient is φ = 41329440.

The previous prime is 128122937. The next prime is 128122963. The reversal of 128122938 is 839221821.

It is not an unprimeable number, because it can be changed into a prime (128122933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36595 + ... + 39942.

It is an arithmetic number, because the mean of its divisors is an integer number (9184560).

Almost surely, 2^128122938 is an apocalyptic number.

128122938 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

128122938 is an abundant number, since it is smaller than the sum of its proper divisors (165782982).

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

128122938 is a wasteful number, since it uses less digits than its factorization.

128122938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76579 (or 76573 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 128122938 is about 11319.1403383826. The cubic root of 128122938 is about 504.1297143450.

The spelling of 128122938 in words is "one hundred twenty-eight million, one hundred twenty-two thousand, nine hundred thirty-eight".