128423824 has 20 divisors (see below), whose sum is σ = 256848640. Its totient is φ = 62140320.

The previous prime is 128423821. The next prime is 128423833. The reversal of 128423824 is 428324821.

128423824 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 128423824.

It is not an unprimeable number, because it can be changed into a prime (128423821) 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, 128964 + ... + 129955.

It is an arithmetic number, because the mean of its divisors is an integer number (12842432).

Almost surely, 2^128423824 is an apocalyptic number.

It is an amenable number.

128423824 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

128423824 is a wasteful number, since it uses less digits than its factorization.

128423824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258958 (or 258952 counting only the distinct ones).

The product of its digits is 24576, while the sum is 34.

The square root of 128423824 is about 11332.4235713284. The cubic root of 128423824 is about 504.5240413094.

The spelling of 128423824 in words is "one hundred twenty-eight million, four hundred twenty-three thousand, eight hundred twenty-four".