128242880 has 28 divisors (see below), whose sum is σ = 305379120. Its totient is φ = 51297024.

The previous prime is 128242861. The next prime is 128242889. The reversal of 128242880 is 88242821.

It is a self number, because there is not a number n which added to its sum of digits gives 128242880.

It is not an unprimeable number, because it can be changed into a prime (128242889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200060 + ... + 200699.

Almost surely, 2^128242880 is an apocalyptic number.

128242880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128242880 is an abundant number, since it is smaller than the sum of its proper divisors (177136240).

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

128242880 is an equidigital number, since it uses as much as digits as its factorization.

128242880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400776 (or 400766 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 35.

The square root of 128242880 is about 11324.4372928636. The cubic root of 128242880 is about 504.2869785801.

The spelling of 128242880 in words is "one hundred twenty-eight million, two hundred forty-two thousand, eight hundred eighty".