128078280 has 128 divisors (see below), whose sum is σ = 465782400. Its totient is φ = 31046400.

The previous prime is 128078261. The next prime is 128078287. The reversal of 128078280 is 82870821.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (128078287) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6490 + ... + 17270.

It is an arithmetic number, because the mean of its divisors is an integer number (3638925).

Almost surely, 2^128078280 is an apocalyptic number.

128078280 is a gapful number since it is divisible by the number (10) 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 128078280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (232891200).

128078280 is an abundant number, since it is smaller than the sum of its proper divisors (337704120).

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

128078280 is a wasteful number, since it uses less digits than its factorization.

128078280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10812 (or 10802 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 36.

The square root of 128078280 is about 11317.1674901452. The cubic root of 128078280 is about 504.0711350842.

The spelling of 128078280 in words is "one hundred twenty-eight million, seventy-eight thousand, two hundred eighty".