128403832 has 8 divisors (see below), whose sum is σ = 240757200. Its totient is φ = 64201912.

The previous prime is 128403827. The next prime is 128403857. The reversal of 128403832 is 238304821.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 128403794 and 128403803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8025232 + ... + 8025247.

It is an arithmetic number, because the mean of its divisors is an integer number (30094650).

Almost surely, 2^128403832 is an apocalyptic number.

It is an amenable number.

128403832 is a deficient number, since it is larger than the sum of its proper divisors (112353368).

128403832 is a wasteful number, since it uses less digits than its factorization.

128403832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16050485 (or 16050481 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 128403832 is about 11331.5414661907. The cubic root of 128403832 is about 504.4978598534.

The spelling of 128403832 in words is "one hundred twenty-eight million, four hundred three thousand, eight hundred thirty-two".