128867328 has 176 divisors, whose sum is σ = 393024000. Its totient is φ = 41693184.

The previous prime is 128867309. The next prime is 128867339. The reversal of 128867328 is 823768821.

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, 1631193 + ... + 1631271.

Almost surely, 2^128867328 is an apocalyptic number.

128867328 is a gapful number since it is divisible by the number (18) 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 128867328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196512000).

128867328 is an abundant number, since it is smaller than the sum of its proper divisors (264156672).

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

128867328 is an equidigital number, since it uses as much as digits as its factorization.

128867328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167 (or 143 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 128867328 is about 11351.9746299928. The cubic root of 128867328 is about 505.1041552314.

The spelling of 128867328 in words is "one hundred twenty-eight million, eight hundred sixty-seven thousand, three hundred twenty-eight".