128536972 has 24 divisors (see below), whose sum is σ = 235148256. Its totient is φ = 61362048.

The previous prime is 128536951. The next prime is 128536973. The reversal of 128536972 is 279635821.

It is not an unprimeable number, because it can be changed into a prime (128536973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72448 + ... + 74200.

It is an arithmetic number, because the mean of its divisors is an integer number (9797844).

Almost surely, 2^128536972 is an apocalyptic number.

It is an amenable number.

128536972 is a deficient number, since it is larger than the sum of its proper divisors (106611284).

128536972 is a wasteful number, since it uses less digits than its factorization.

128536972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2577 (or 2575 counting only the distinct ones).

The product of its digits is 181440, while the sum is 43.

The square root of 128536972 is about 11337.4146964817. The cubic root of 128536972 is about 504.6721683662.

The spelling of 128536972 in words is "one hundred twenty-eight million, five hundred thirty-six thousand, nine hundred seventy-two".