128928830 has 8 divisors (see below), whose sum is σ = 232071912. Its totient is φ = 51571528.

The previous prime is 128928827. The next prime is 128928847. The reversal of 128928830 is 38829821.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 6446432 + ... + 6446451.

It is an arithmetic number, because the mean of its divisors is an integer number (29008989).

Almost surely, 2^128928830 is an apocalyptic number.

128928830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128928830 is a deficient number, since it is larger than the sum of its proper divisors (103143082).

128928830 is a wasteful number, since it uses less digits than its factorization.

128928830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12892890.

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 128928830 is about 11354.6831747962. The cubic root of 128928830 is about 505.1844961930.

Subtracting from 128928830 its reverse (38829821), we obtain a palindrome (90099009).

The spelling of 128928830 in words is "one hundred twenty-eight million, nine hundred twenty-eight thousand, eight hundred thirty".