9378649820 has 12 divisors (see below), whose sum is σ = 19695164664. Its totient is φ = 3751459920.

The previous prime is 9378649807. The next prime is 9378649829. The reversal of 9378649820 is 289468739.

It is a happy number.

9378649820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9378649829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234466226 + ... + 234466265.

It is an arithmetic number, because the mean of its divisors is an integer number (1641263722).

Almost surely, 2^9378649820 is an apocalyptic number.

It is an amenable number.

9378649820 is an abundant number, since it is smaller than the sum of its proper divisors (10316514844).

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

9378649820 is a wasteful number, since it uses less digits than its factorization.

9378649820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468932500 (or 468932498 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 56.

The square root of 9378649820 is about 96843.4294105697. The cubic root of 9378649820 is about 2108.8552612998.

The spelling of 9378649820 in words is "nine billion, three hundred seventy-eight million, six hundred forty-nine thousand, eight hundred twenty".