128228829 has 8 divisors (see below), whose sum is σ = 171024192. Its totient is φ = 85459680.

The previous prime is 128228819. The next prime is 128228833. The reversal of 128228829 is 928822821.

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

It is not a de Polignac number, because 128228829 - 2¹³ = 128220637 is a prime.

It is a super-2 number, since 2×128228829² = 32885265173422482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128228809) 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, 14872 + ... + 21854.

It is an arithmetic number, because the mean of its divisors is an integer number (21378024).

Almost surely, 2^128228829 is an apocalyptic number.

It is an amenable number.

128228829 is a deficient number, since it is larger than the sum of its proper divisors (42795363).

128228829 is an equidigital number, since it uses as much as digits as its factorization.

128228829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13107.

The product of its digits is 73728, while the sum is 42.

The square root of 128228829 is about 11323.8168918435. The cubic root of 128228829 is about 504.2685604163.

The spelling of 128228829 in words is "one hundred twenty-eight million, two hundred twenty-eight thousand, eight hundred twenty-nine".