9378420786 has 64 divisors (see below), whose sum is σ = 25071820800. Its totient is φ = 2538517968.

The previous prime is 9378420781. The next prime is 9378420817. The reversal of 9378420786 is 6870248739.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (9378420781) 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 31 ways as a sum of consecutive naturals, for example, 645730 + ... + 660093.

It is an arithmetic number, because the mean of its divisors is an integer number (391747200).

Almost surely, 2^9378420786 is an apocalyptic number.

9378420786 is an abundant number, since it is smaller than the sum of its proper divisors (15693400014).

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

9378420786 is a wasteful number, since it uses less digits than its factorization.

9378420786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1305860 (or 1305854 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The square root of 9378420786 is about 96842.2469070188. The cubic root of 9378420786 is about 2108.8380945258.

The spelling of 9378420786 in words is "nine billion, three hundred seventy-eight million, four hundred twenty thousand, seven hundred eighty-six".