9447686378 has 16 divisors (see below), whose sum is σ = 15271095840. Its totient is φ = 4357771056.

The previous prime is 9447686377. The next prime is 9447686383. The reversal of 9447686378 is 8736867449.

It is a self number, because there is not a number n which added to its sum of digits gives 9447686378.

It is not an unprimeable number, because it can be changed into a prime (9447686377) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69368 + ... + 153971.

It is an arithmetic number, because the mean of its divisors is an integer number (954443490).

Almost surely, 2^9447686378 is an apocalyptic number.

9447686378 is a deficient number, since it is larger than the sum of its proper divisors (5823409462).

9447686378 is a wasteful number, since it uses less digits than its factorization.

9447686378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224981.

The product of its digits is 48771072, while the sum is 62.

The square root of 9447686378 is about 97199.2097601621. The cubic root of 9447686378 is about 2114.0170681254.

The spelling of 9447686378 in words is "nine billion, four hundred forty-seven million, six hundred eighty-six thousand, three hundred seventy-eight".