28773811616887 has 8 divisors (see below), whose sum is σ = 29335862540880. Its totient is φ = 28212469908480.

The previous prime is 28773811616867. The next prime is 28773811616911. The reversal of 28773811616887 is 78861611837782.

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 28773811616887 - 2¹⁹ = 28773811092599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28773811616867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177221962 + ... + 177384247.

It is an arithmetic number, because the mean of its divisors is an integer number (3666982817610).

Almost surely, 2^{28773811616887} is an apocalyptic number.

28773811616887 is a deficient number, since it is larger than the sum of its proper divisors (562050923993).

28773811616887 is a wasteful number, since it uses less digits than its factorization.

28773811616887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354607793.

The product of its digits is 303464448, while the sum is 73.

The spelling of 28773811616887 in words is "twenty-eight trillion, seven hundred seventy-three billion, eight hundred eleven million, six hundred sixteen thousand, eight hundred eighty-seven".