128815104 has 104 divisors (see below), whose sum is σ = 375082272. Its totient is φ = 38993920.

The previous prime is 128815081. The next prime is 128815121. The reversal of 128815104 is 401518821.

It is a happy number.

It is a nialpdrome in base 8.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134692 + ... + 135644.

Almost surely, 2^128815104 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 128815104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187541136).

128815104 is an abundant number, since it is smaller than the sum of its proper divisors (246267168).

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

128815104 is an equidigital number, since it uses as much as digits as its factorization.

128815104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991 (or 969 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 30.

The square root of 128815104 is about 11349.6741803454. The cubic root of 128815104 is about 505.0359141860.

The spelling of 128815104 in words is "one hundred twenty-eight million, eight hundred fifteen thousand, one hundred four".