9830778678 has 40 divisors (see below), whose sum is σ = 25175118672. Its totient is φ = 2808793584.

The previous prime is 9830778667. The next prime is 9830778679. The reversal of 9830778678 is 8768770389.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9830778679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4333425 + ... + 4335692.

Almost surely, 2^9830778678 is an apocalyptic number.

9830778678 is an abundant number, since it is smaller than the sum of its proper divisors (15344339994).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9830778678 is a wasteful number, since it uses less digits than its factorization.

9830778678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8669138 (or 8669129 counting only the distinct ones).

The product of its (nonzero) digits is 28449792, while the sum is 63.

The square root of 9830778678 is about 99150.2832976286. The cubic root of 9830778678 is about 2142.2129463692.

The spelling of 9830778678 in words is "nine billion, eight hundred thirty million, seven hundred seventy-eight thousand, six hundred seventy-eight".