128885388 has 24 divisors (see below), whose sum is σ = 304358208. Its totient is φ = 42443856.

The previous prime is 128885371. The next prime is 128885389. The reversal of 128885388 is 883588821.

It is a super-2 number, since 2×128885388² = 33222886479821088, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 128885388.

It is not an unprimeable number, because it can be changed into a prime (128885389) 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, 63706 + ... + 65697.

It is an arithmetic number, because the mean of its divisors is an integer number (12681592).

Almost surely, 2^128885388 is an apocalyptic number.

It is an amenable number.

128885388 is an abundant number, since it is smaller than the sum of its proper divisors (175472820).

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

128885388 is a wasteful number, since it uses less digits than its factorization.

128885388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129493 (or 129491 counting only the distinct ones).

The product of its digits is 983040, while the sum is 51.

The square root of 128885388 is about 11352.7700584483. The cubic root of 128885388 is about 505.1277499239.

The spelling of 128885388 in words is "one hundred twenty-eight million, eight hundred eighty-five thousand, three hundred eighty-eight".