128412216 has 80 divisors (see below), whose sum is σ = 366557400. Its totient is φ = 41985216.

The previous prime is 128412173. The next prime is 128412217. The reversal of 128412216 is 612214821.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 128412216.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128412217) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 32475 + ... + 36213.

Almost surely, 2^128412216 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 128412216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183278700).

128412216 is an abundant number, since it is smaller than the sum of its proper divisors (238145184).

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

128412216 is a wasteful number, since it uses less digits than its factorization.

128412216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3810 (or 3797 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 128412216 is about 11331.9114009950. The cubic root of 128412216 is about 504.5088398424.

The spelling of 128412216 in words is "one hundred twenty-eight million, four hundred twelve thousand, two hundred sixteen".