9838621385 has 8 divisors (see below), whose sum is σ = 11820127176. Its totient is φ = 7861709440.

The previous prime is 9838621367. The next prime is 9838621417. The reversal of 9838621385 is 5831268389.

9838621385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3027090361 + 6811531024 = 55019^2 + 82532^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9838621385 - 2¹² = 9838617289 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1143746 + ... + 1152315.

It is an arithmetic number, because the mean of its divisors is an integer number (1477515897).

Almost surely, 2^9838621385 is an apocalyptic number.

It is an amenable number.

9838621385 is a deficient number, since it is larger than the sum of its proper divisors (1981505791).

9838621385 is a wasteful number, since it uses less digits than its factorization.

9838621385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2296923.

The product of its digits is 2488320, while the sum is 53.

The square root of 9838621385 is about 99189.8250074069. The cubic root of 9838621385 is about 2142.7824598427.

The spelling of 9838621385 in words is "nine billion, eight hundred thirty-eight million, six hundred twenty-one thousand, three hundred eighty-five".