128530711 has 8 divisors (see below), whose sum is σ = 132147584. Its totient is φ = 124921440.

The previous prime is 128530679. The next prime is 128530751. The reversal of 128530711 is 117035821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 5-Lehmer number, since φ(128530711) divides (128530711-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 128530711 - 2⁵ = 128530679 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128530711.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128530751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58906 + ... + 61048.

It is an arithmetic number, because the mean of its divisors is an integer number (16518448).

Almost surely, 2^128530711 is an apocalyptic number.

128530711 is the 6546-th hex number.

128530711 is a deficient number, since it is larger than the sum of its proper divisors (3616873).

128530711 is a wasteful number, since it uses less digits than its factorization.

128530711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3801.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 128530711 is about 11337.1385719678. The cubic root of 128530711 is about 504.6639740864.

The spelling of 128530711 in words is "one hundred twenty-eight million, five hundred thirty thousand, seven hundred eleven".