128030811 has 8 divisors (see below), whose sum is σ = 178129920. Its totient is φ = 81642792.

The previous prime is 128030803. The next prime is 128030813. The reversal of 128030811 is 118030821.

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

It is not a de Polignac number, because 128030811 - 2³ = 128030803 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128030813) 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, 927691 + ... + 927828.

It is an arithmetic number, because the mean of its divisors is an integer number (22266240).

Almost surely, 2^128030811 is an apocalyptic number.

128030811 is a deficient number, since it is larger than the sum of its proper divisors (50099109).

128030811 is a wasteful number, since it uses less digits than its factorization.

128030811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1855545.

The product of its (nonzero) digits is 384, while the sum is 24.

The square root of 128030811 is about 11315.0700837423. The cubic root of 128030811 is about 504.0088536175.

The spelling of 128030811 in words is "one hundred twenty-eight million, thirty thousand, eight hundred eleven".