128455280 has 20 divisors (see below), whose sum is σ = 298658712. Its totient is φ = 51382080.

The previous prime is 128455279. The next prime is 128455291. The reversal of 128455280 is 82554821.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 128455280.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 802766 + ... + 802925.

Almost surely, 2^128455280 is an apocalyptic number.

128455280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128455280 is an abundant number, since it is smaller than the sum of its proper divisors (170203432).

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

128455280 is a wasteful number, since it uses less digits than its factorization.

128455280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1605704 (or 1605698 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 35.

The square root of 128455280 is about 11333.8113624676. The cubic root of 128455280 is about 504.5652304807.

The spelling of 128455280 in words is "one hundred twenty-eight million, four hundred fifty-five thousand, two hundred eighty".