128677730 has 16 divisors (see below), whose sum is σ = 232917120. Its totient is φ = 51182832.

The previous prime is 128677729. The next prime is 128677751. The reversal of 128677730 is 37776821.

It is an unprimeable number.

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, 34154 + ... + 37733.

It is an arithmetic number, because the mean of its divisors is an integer number (14557320).

Almost surely, 2^128677730 is an apocalyptic number.

128677730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128677730 is a deficient number, since it is larger than the sum of its proper divisors (104239390).

128677730 is a wasteful number, since it uses less digits than its factorization.

128677730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72073.

The product of its (nonzero) digits is 98784, while the sum is 41.

The square root of 128677730 is about 11343.6206741939. The cubic root of 128677730 is about 504.8563196121.

Subtracting from 128677730 its reverse (37776821), we obtain a palindrome (90900909).

The spelling of 128677730 in words is "one hundred twenty-eight million, six hundred seventy-seven thousand, seven hundred thirty".