128235216 has 80 divisors (see below), whose sum is σ = 362923200. Its totient is φ = 38836224.

The previous prime is 128235209. The next prime is 128235221. The reversal of 128235216 is 612532821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20955 + ... + 26373.

It is an arithmetic number, because the mean of its divisors is an integer number (4536540).

Almost surely, 2^128235216 is an apocalyptic number.

128235216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128235216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181461600).

128235216 is an abundant number, since it is smaller than the sum of its proper divisors (234687984).

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

128235216 is a wasteful number, since it uses less digits than its factorization.

128235216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5476 (or 5470 counting only the distinct ones).

The product of its digits is 5760, while the sum is 30.

The square root of 128235216 is about 11324.0989045487. The cubic root of 128235216 is about 504.2769327140.

The spelling of 128235216 in words is "one hundred twenty-eight million, two hundred thirty-five thousand, two hundred sixteen".