128839224 has 64 divisors (see below), whose sum is σ = 334909440. Its totient is φ = 41258880.

The previous prime is 128839219. The next prime is 128839253. The reversal of 128839224 is 422938821.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 116257 + ... + 117359.

It is an arithmetic number, because the mean of its divisors is an integer number (5232960).

Almost surely, 2^128839224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128839224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167454720).

128839224 is an abundant number, since it is smaller than the sum of its proper divisors (206070216).

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

128839224 is a wasteful number, since it uses less digits than its factorization.

128839224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1300 (or 1296 counting only the distinct ones).

The product of its digits is 55296, while the sum is 39.

The square root of 128839224 is about 11350.7367161784. The cubic root of 128839224 is about 505.0674340561.

The spelling of 128839224 in words is "one hundred twenty-eight million, eight hundred thirty-nine thousand, two hundred twenty-four".