128275530 has 16 divisors (see below), whose sum is σ = 307861344. Its totient is φ = 34206800.

The previous prime is 128275519. The next prime is 128275547. The reversal of 128275530 is 35572821.

It is a super-2 number, since 2×128275530² = 32909223193561800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 128275491 and 128275500.

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 7 ways as a sum of consecutive naturals, for example, 2137896 + ... + 2137955.

It is an arithmetic number, because the mean of its divisors is an integer number (19241334).

Almost surely, 2^128275530 is an apocalyptic number.

128275530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128275530 is an abundant number, since it is smaller than the sum of its proper divisors (179585814).

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

128275530 is a wasteful number, since it uses less digits than its factorization.

128275530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4275861.

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 128275530 is about 11325.8787738524. The cubic root of 128275530 is about 504.3297712684.

The spelling of 128275530 in words is "one hundred twenty-eight million, two hundred seventy-five thousand, five hundred thirty".