9978735242 has 48 divisors (see below), whose sum is σ = 19237746240. Its totient is φ = 3850019712.

The previous prime is 9978735241. The next prime is 9978735253. The reversal of 9978735242 is 2425378799.

It is not an unprimeable number, because it can be changed into a prime (9978735241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91892 + ... + 168527.

It is an arithmetic number, because the mean of its divisors is an integer number (400786380).

Almost surely, 2^9978735242 is an apocalyptic number.

9978735242 is a deficient number, since it is larger than the sum of its proper divisors (9259010998).

9978735242 is a wasteful number, since it uses less digits than its factorization.

9978735242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260475 (or 260468 counting only the distinct ones).

The product of its digits is 7620480, while the sum is 56.

The square root of 9978735242 is about 99893.6196260802. The cubic root of 9978735242 is about 2152.9064885480.

The spelling of 9978735242 in words is "nine billion, nine hundred seventy-eight million, seven hundred thirty-five thousand, two hundred forty-two".