128793945 has 16 divisors (see below), whose sum is σ = 235509120. Its totient is φ = 58877184.

The previous prime is 128793943. The next prime is 128793949. The reversal of 128793945 is 549397821.

It is not a de Polignac number, because 128793945 - 2¹ = 128793943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128793894 and 128793903.

It is not an unprimeable number, because it can be changed into a prime (128793941) 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 15 ways as a sum of consecutive naturals, for example, 613200 + ... + 613409.

It is an arithmetic number, because the mean of its divisors is an integer number (14719320).

Almost surely, 2^128793945 is an apocalyptic number.

128793945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128793945 is a deficient number, since it is larger than the sum of its proper divisors (106715175).

128793945 is a wasteful number, since it uses less digits than its factorization.

128793945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1226624.

The product of its digits is 544320, while the sum is 48.

The square root of 128793945 is about 11348.7420007682. The cubic root of 128793945 is about 505.0082604929.

The spelling of 128793945 in words is "one hundred twenty-eight million, seven hundred ninety-three thousand, nine hundred forty-five".