28986685399 has 16 divisors (see below), whose sum is σ = 34876199680. Its totient is φ = 23534686080.

The previous prime is 28986685381. The next prime is 28986685411. The reversal of 28986685399 is 99358668982.

It is a cyclic number.

It is not a de Polignac number, because 28986685399 - 2⁵ = 28986685367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28986685319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1387864 + ... + 1408594.

It is an arithmetic number, because the mean of its divisors is an integer number (2179762480).

Almost surely, 2^28986685399 is an apocalyptic number.

28986685399 is a deficient number, since it is larger than the sum of its proper divisors (5889514281).

28986685399 is a wasteful number, since it uses less digits than its factorization.

28986685399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31270.

The product of its digits is 403107840, while the sum is 73.

The spelling of 28986685399 in words is "twenty-eight billion, nine hundred eighty-six million, six hundred eighty-five thousand, three hundred ninety-nine".