128757228 has 24 divisors (see below), whose sum is σ = 300807360. Its totient is φ = 42865680.

The previous prime is 128757221. The next prime is 128757241. The reversal of 128757228 is 822757821.

It is a self number, because there is not a number n which added to its sum of digits gives 128757228.

It is not an unprimeable number, because it can be changed into a prime (128757221) 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, 4063 + ... + 16553.

It is an arithmetic number, because the mean of its divisors is an integer number (12533640).

Almost surely, 2^128757228 is an apocalyptic number.

It is an amenable number.

128757228 is an abundant number, since it is smaller than the sum of its proper divisors (172050132).

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

128757228 is a wasteful number, since it uses less digits than its factorization.

128757228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13357 (or 13355 counting only the distinct ones).

The product of its digits is 125440, while the sum is 42.

The square root of 128757228 is about 11347.1242171750. The cubic root of 128757228 is about 504.9602661284.

The spelling of 128757228 in words is "one hundred twenty-eight million, seven hundred fifty-seven thousand, two hundred twenty-eight".