128312842 has 8 divisors (see below), whose sum is σ = 219964896. Its totient is φ = 54991212.

The previous prime is 128312831. The next prime is 128312843. The reversal of 128312842 is 248213821.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (128312843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4582588 + ... + 4582615.

It is an arithmetic number, because the mean of its divisors is an integer number (27495612).

Almost surely, 2^128312842 is an apocalyptic number.

128312842 is a deficient number, since it is larger than the sum of its proper divisors (91652054).

128312842 is an equidigital number, since it uses as much as digits as its factorization.

128312842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9165212.

The product of its digits is 6144, while the sum is 31.

The square root of 128312842 is about 11327.5258551901. The cubic root of 128312842 is about 504.3786653123.

The spelling of 128312842 in words is "one hundred twenty-eight million, three hundred twelve thousand, eight hundred forty-two".