128428844 has 12 divisors (see below), whose sum is σ = 225195600. Its totient is φ = 64087248.

The previous prime is 128428843. The next prime is 128428891. The reversal of 128428844 is 448824821.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (128428843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29504 + ... + 33575.

It is an arithmetic number, because the mean of its divisors is an integer number (18766300).

Almost surely, 2^128428844 is an apocalyptic number.

It is an amenable number.

128428844 is a deficient number, since it is larger than the sum of its proper divisors (96766756).

128428844 is a wasteful number, since it uses less digits than its factorization.

128428844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63592 (or 63590 counting only the distinct ones).

The product of its digits is 131072, while the sum is 41.

The square root of 128428844 is about 11332.6450575318. The cubic root of 128428844 is about 504.5306150577.

The spelling of 128428844 in words is "one hundred twenty-eight million, four hundred twenty-eight thousand, eight hundred forty-four".