128269938 has 16 divisors (see below), whose sum is σ = 257283360. Its totient is φ = 42632736.

The previous prime is 128269937. The next prime is 128269997. The reversal of 128269938 is 839962821.

It is not an unprimeable number, because it can be changed into a prime (128269937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28723 + ... + 32886.

It is an arithmetic number, because the mean of its divisors is an integer number (16080210).

Almost surely, 2^128269938 is an apocalyptic number.

128269938 is an abundant number, since it is smaller than the sum of its proper divisors (129013422).

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

128269938 is a wasteful number, since it uses less digits than its factorization.

128269938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61961.

The product of its digits is 373248, while the sum is 48.

The square root of 128269938 is about 11325.6319029006. The cubic root of 128269938 is about 504.3224426348.

The spelling of 128269938 in words is "one hundred twenty-eight million, two hundred sixty-nine thousand, nine hundred thirty-eight".