128227530 has 64 divisors (see below), whose sum is σ = 325140480. Its totient is φ = 32298816.

The previous prime is 128227529. The next prime is 128227537. The reversal of 128227530 is 35722821.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (128227537) by changing a digit.

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, 56151 + ... + 58389.

It is an arithmetic number, because the mean of its divisors is an integer number (5080320).

Almost surely, 2^128227530 is an apocalyptic number.

128227530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 128227530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162570240).

128227530 is an abundant number, since it is smaller than the sum of its proper divisors (196912950).

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

128227530 is a wasteful number, since it uses less digits than its factorization.

128227530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2355.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 128227530 is about 11323.7595347128. The cubic root of 128227530 is about 504.2668576087.

The spelling of 128227530 in words is "one hundred twenty-eight million, two hundred twenty-seven thousand, five hundred thirty".