128018427 has 8 divisors (see below), whose sum is σ = 170768400. Its totient is φ = 85307040.

The previous prime is 128018419. The next prime is 128018489. The reversal of 128018427 is 724810821.

It is a happy number.

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

It is not a de Polignac number, because 128018427 - 2³ = 128018419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128018497) 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, 724 + ... + 16017.

It is an arithmetic number, because the mean of its divisors is an integer number (21346050).

Almost surely, 2^128018427 is an apocalyptic number.

128018427 is a deficient number, since it is larger than the sum of its proper divisors (42749973).

128018427 is a wasteful number, since it uses less digits than its factorization.

128018427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19293.

The product of its (nonzero) digits is 7168, while the sum is 33.

The square root of 128018427 is about 11314.5228357187. The cubic root of 128018427 is about 503.9926027196.

The spelling of 128018427 in words is "one hundred twenty-eight million, eighteen thousand, four hundred twenty-seven".