128231732 has 12 divisors (see below), whose sum is σ = 224486976. Its totient is φ = 64092600.

The previous prime is 128231711. The next prime is 128231737. The reversal of 128231732 is 237132821.

It is a junction number, because it is equal to n+sod(n) for n = 128231695 and 128231704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128231737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14357 + ... + 21507.

It is an arithmetic number, because the mean of its divisors is an integer number (18707248).

Almost surely, 2^128231732 is an apocalyptic number.

It is an amenable number.

128231732 is a deficient number, since it is larger than the sum of its proper divisors (96255244).

128231732 is a wasteful number, since it uses less digits than its factorization.

128231732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11638 (or 11636 counting only the distinct ones).

The product of its digits is 4032, while the sum is 29.

The square root of 128231732 is about 11323.9450722794. The cubic root of 128231732 is about 504.2723658023.

The spelling of 128231732 in words is "one hundred twenty-eight million, two hundred thirty-one thousand, seven hundred thirty-two".