128817104 has 20 divisors (see below), whose sum is σ = 268782276. Its totient is φ = 59453952.

The previous prime is 128817097. The next prime is 128817179. The reversal of 128817104 is 401718821.

It can be written as a sum of positive squares in 2 ways, for example, as 17472400 + 111344704 = 4180^2 + 10552^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 309449 + ... + 309864.

Almost surely, 2^128817104 is an apocalyptic number.

It is an amenable number.

128817104 is an abundant number, since it is smaller than the sum of its proper divisors (139965172).

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

128817104 is a wasteful number, since it uses less digits than its factorization.

128817104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619334 (or 619328 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 32.

The square root of 128817104 is about 11349.7622882596. The cubic root of 128817104 is about 505.0385279235.

The spelling of 128817104 in words is "one hundred twenty-eight million, eight hundred seventeen thousand, one hundred four".