128919228 has 48 divisors (see below), whose sum is σ = 321711264. Its totient is φ = 40038400.

The previous prime is 128919223. The next prime is 128919233. The reversal of 128919228 is 822919821.

128919228 = T₁₅₄₇ + T₁₅₄₈ + ... + T₁₆₄₇.

It is an interprime number because it is at equal distance from previous prime (128919223) and next prime (128919233).

It is a self number, because there is not a number n which added to its sum of digits gives 128919228.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128919221) 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, 17476 + ... + 23732.

It is an arithmetic number, because the mean of its divisors is an integer number (6702318).

Almost surely, 2^128919228 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128919228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160855632).

128919228 is an abundant number, since it is smaller than the sum of its proper divisors (192792036).

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

128919228 is a wasteful number, since it uses less digits than its factorization.

128919228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6382 (or 6380 counting only the distinct ones).

The product of its digits is 41472, while the sum is 42.

The square root of 128919228 is about 11354.2603457909. The cubic root of 128919228 is about 505.1719546434.

The spelling of 128919228 in words is "one hundred twenty-eight million, nine hundred nineteen thousand, two hundred twenty-eight".