128271078 has 48 divisors (see below), whose sum is σ = 300265056. Its totient is φ = 39340800.

The previous prime is 128271067. The next prime is 128271079. The reversal of 128271078 is 870172821.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128271079) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93151 + ... + 94517.

It is an arithmetic number, because the mean of its divisors is an integer number (6255522).

Almost surely, 2^128271078 is an apocalyptic number.

128271078 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 128271078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150132528).

128271078 is an abundant number, since it is smaller than the sum of its proper divisors (171993978).

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

128271078 is a wasteful number, since it uses less digits than its factorization.

128271078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1789 (or 1786 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 36.

The square root of 128271078 is about 11325.6822311064. The cubic root of 128271078 is about 504.3239366868.

The spelling of 128271078 in words is "one hundred twenty-eight million, two hundred seventy-one thousand, seventy-eight".