28878661823389 has 8 divisors (see below), whose sum is σ = 33004219002048. Its totient is φ = 24753113160000.

The previous prime is 28878661823387. The next prime is 28878661823441. The reversal of 28878661823389 is 98332816687882.

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 28878661823389 - 2¹ = 28878661823387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28878661823381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9056514 + ... + 11822764.

It is an arithmetic number, because the mean of its divisors is an integer number (4125527375256).

Almost surely, 2^{28878661823389} is an apocalyptic number.

It is an amenable number.

28878661823389 is a deficient number, since it is larger than the sum of its proper divisors (4125557178659).

28878661823389 is a wasteful number, since it uses less digits than its factorization.

28878661823389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4257635.

The product of its digits is 2675441664, while the sum is 79.

The spelling of 28878661823389 in words is "twenty-eight trillion, eight hundred seventy-eight billion, six hundred sixty-one million, eight hundred twenty-three thousand, three hundred eighty-nine".