8128478242 has 16 divisors (see below), whose sum is σ = 12434627520. Its totient is φ = 3983748912.

The previous prime is 8128478207. The next prime is 8128478263. The reversal of 8128478242 is 2428748218.

It is a junction number, because it is equal to n+sod(n) for n = 8128478192 and 8128478201.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76609 + ... + 148747.

It is an arithmetic number, because the mean of its divisors is an integer number (777164220).

Almost surely, 2^8128478242 is an apocalyptic number.

8128478242 is a deficient number, since it is larger than the sum of its proper divisors (4306149278).

8128478242 is a wasteful number, since it uses less digits than its factorization.

8128478242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73257.

The product of its digits is 458752, while the sum is 46.

The square root of 8128478242 is about 90158.0736373621. The cubic root of 8128478242 is about 2010.6497113366.

The spelling of 8128478242 in words is "eight billion, one hundred twenty-eight million, four hundred seventy-eight thousand, two hundred forty-two".