128450560 has 120 divisors (see below), whose sum is σ = 358612650. Its totient is φ = 44040192.

The previous prime is 128450533. The next prime is 128450563. The reversal of 128450560 is 65054821.

It can be written as a sum of positive squares in only one way, i.e., 115605504 + 12845056 = 10752^2 + 3584^2 .

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (128450563) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18350077 + ... + 18350083.

Almost surely, 2^128450560 is an apocalyptic number.

128450560 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 128450560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179306325).

128450560 is an abundant number, since it is smaller than the sum of its proper divisors (230162090).

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

128450560 is an frugal number, since it uses more digits than its factorization.

128450560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57 (or 14 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 128450560 is about 11333.6031340435. The cubic root of 128450560 is about 504.5590504387.

The spelling of 128450560 in words is "one hundred twenty-eight million, four hundred fifty thousand, five hundred sixty".