128973864 has 32 divisors (see below), whose sum is σ = 330301440. Its totient is φ = 41942400.

The previous prime is 128973863. The next prime is 128973893. The reversal of 128973864 is 468379821.

It is not an unprimeable number, because it can be changed into a prime (128973863) 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 7 ways as a sum of consecutive naturals, for example, 64552 + ... + 66519.

It is an arithmetic number, because the mean of its divisors is an integer number (10321920).

Almost surely, 2^128973864 is an apocalyptic number.

It is an amenable number.

128973864 is an abundant number, since it is smaller than the sum of its proper divisors (201327576).

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

128973864 is a wasteful number, since it uses less digits than its factorization.

128973864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131121 (or 131117 counting only the distinct ones).

The product of its digits is 580608, while the sum is 48.

The square root of 128973864 is about 11356.6660600724. Note that the first 3 decimals coincide. The cubic root of 128973864 is about 505.2433085632.

It can be divided in two parts, 12897 and 3864, that added together give a palindrome (16761).

The spelling of 128973864 in words is "one hundred twenty-eight million, nine hundred seventy-three thousand, eight hundred sixty-four".