128422560 has 192 divisors, whose sum is σ = 475276032. Its totient is φ = 28532736.

The previous prime is 128422559. The next prime is 128422583. The reversal of 128422560 is 65224821.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 123804 + ... + 124836.

It is an arithmetic number, because the mean of its divisors is an integer number (2475396).

Almost surely, 2^128422560 is an apocalyptic number.

128422560 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 128422560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (237638016).

128422560 is an abundant number, since it is smaller than the sum of its proper divisors (346853472).

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

128422560 is a wasteful number, since it uses less digits than its factorization.

128422560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1095 (or 1087 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 128422560 is about 11332.3678020085. The cubic root of 128422560 is about 504.5223860597.

The spelling of 128422560 in words is "one hundred twenty-eight million, four hundred twenty-two thousand, five hundred sixty".