128302912 has 42 divisors (see below), whose sum is σ = 258510278. Its totient is φ = 63178752.

The previous prime is 128302907. The next prime is 128302921. The reversal of 128302912 is 219203821.

It can be written as a sum of positive squares in 3 ways, for example, as 16451136 + 111851776 = 4056^2 + 10576^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 817138 + ... + 817294.

Almost surely, 2^128302912 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 128302912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129255139).

128302912 is an abundant number, since it is smaller than the sum of its proper divisors (130207366).

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

128302912 is an equidigital number, since it uses as much as digits as its factorization.

128302912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395 (or 272 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 128302912 is about 11327.0875338721. The cubic root of 128302912 is about 504.3656538598.

Subtracting 128302912 from its reverse (219203821), we obtain a palindrome (90900909).

The spelling of 128302912 in words is "one hundred twenty-eight million, three hundred two thousand, nine hundred twelve".