128015228 has 24 divisors (see below), whose sum is σ = 246685824. Its totient is φ = 57642800.

The previous prime is 128015221. The next prime is 128015231. The reversal of 128015228 is 822510821.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 128015228.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128015221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8888 + ... + 18303.

It is an arithmetic number, because the mean of its divisors is an integer number (10278576).

Almost surely, 2^128015228 is an apocalyptic number.

It is an amenable number.

128015228 is a deficient number, since it is larger than the sum of its proper divisors (118670596).

128015228 is a wasteful number, since it uses less digits than its factorization.

128015228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27313 (or 27311 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 128015228 is about 11314.3814678488. The cubic root of 128015228 is about 503.9884046631.

The spelling of 128015228 in words is "one hundred twenty-eight million, fifteen thousand, two hundred twenty-eight".