128530206 has 32 divisors (see below), whose sum is σ = 326426880. Its totient is φ = 36722808.

The previous prime is 128530169. The next prime is 128530211. The reversal of 128530206 is 602035821.

128530206 is a `hidden beast` number, since 128 + 530 + 2 + 0 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 128530206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169636 + ... + 170391.

It is an arithmetic number, because the mean of its divisors is an integer number (10200840).

Almost surely, 2^128530206 is an apocalyptic number.

128530206 is an abundant number, since it is smaller than the sum of its proper divisors (197896674).

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

128530206 is a wasteful number, since it uses less digits than its factorization.

128530206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340045 (or 340039 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 128530206 is about 11337.1163000121. The cubic root of 128530206 is about 504.6633131402.

The spelling of 128530206 in words is "one hundred twenty-eight million, five hundred thirty thousand, two hundred six".