128430711 has 8 divisors (see below), whose sum is σ = 190267760. Its totient is φ = 85620456.

The previous prime is 128430683. The next prime is 128430719. The reversal of 128430711 is 117034821.

It is not a de Polignac number, because 128430711 - 2⁹ = 128430199 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 4756693 = 128430711 / (1 + 2 + 8 + 4 + 3 + 0 + 7 + 1 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128430719) 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, 2378320 + ... + 2378373.

It is an arithmetic number, because the mean of its divisors is an integer number (23783470).

Almost surely, 2^128430711 is an apocalyptic number.

128430711 is a deficient number, since it is larger than the sum of its proper divisors (61837049).

128430711 is an equidigital number, since it uses as much as digits as its factorization.

128430711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4756702 (or 4756696 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 128430711 is about 11332.7274298820. The cubic root of 128430711 is about 504.5330598722.

The spelling of 128430711 in words is "one hundred twenty-eight million, four hundred thirty thousand, seven hundred eleven".