128432252 has 24 divisors (see below), whose sum is σ = 242498256. Its totient is φ = 59165568.

The previous prime is 128432243. The next prime is 128432257. The reversal of 128432252 is 252234821.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128432257) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 30083 + ... + 34085.

It is an arithmetic number, because the mean of its divisors is an integer number (10104094).

Almost surely, 2^128432252 is an apocalyptic number.

It is an amenable number.

128432252 is a deficient number, since it is larger than the sum of its proper divisors (114066004).

128432252 is a wasteful number, since it uses less digits than its factorization.

128432252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4637 (or 4635 counting only the distinct ones).

The product of its digits is 7680, while the sum is 29.

The square root of 128432252 is about 11332.7954186070. The cubic root of 128432252 is about 504.5350777756.

The spelling of 128432252 in words is "one hundred twenty-eight million, four hundred thirty-two thousand, two hundred fifty-two".