9978722346 has 24 divisors (see below), whose sum is σ = 20669373504. Its totient is φ = 3211541200.

The previous prime is 9978722329. The next prime is 9978722387. The reversal of 9978722346 is 6432278799.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 983730 + ... + 993821.

It is an arithmetic number, because the mean of its divisors is an integer number (861223896).

Almost surely, 2^9978722346 is an apocalyptic number.

9978722346 is an abundant number, since it is smaller than the sum of its proper divisors (10690651158).

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

9978722346 is a wasteful number, since it uses less digits than its factorization.

9978722346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1977614 (or 1977585 counting only the distinct ones).

The product of its digits is 9144576, while the sum is 57.

The square root of 9978722346 is about 99893.5550773923. Note that the first 3 decimals coincide. The cubic root of 9978722346 is about 2152.9055611127.

The spelling of 9978722346 in words is "nine billion, nine hundred seventy-eight million, seven hundred twenty-two thousand, three hundred forty-six".