9780138859 has 8 divisors (see below), whose sum is σ = 9835633152. Its totient is φ = 9724731240.

The previous prime is 9780138857. The next prime is 9780138871. The reversal of 9780138859 is 9588310879.

9780138859 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 9780138859 - 2¹ = 9780138857 is a prime.

It is a super-2 number, since 2×9780138859² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9780138857) 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 7 ways as a sum of consecutive naturals, for example, 211722 + ... + 253744.

It is an arithmetic number, because the mean of its divisors is an integer number (1229454144).

Almost surely, 2^9780138859 is an apocalyptic number.

9780138859 is a deficient number, since it is larger than the sum of its proper divisors (55494293).

9780138859 is a wasteful number, since it uses less digits than its factorization.

9780138859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43337.

The product of its (nonzero) digits is 4354560, while the sum is 58.

The square root of 9780138859 is about 98894.5845787321. The cubic root of 9780138859 is about 2138.5283254421.

The spelling of 9780138859 in words is "nine billion, seven hundred eighty million, one hundred thirty-eight thousand, eight hundred fifty-nine".