28773811616889 has 32 divisors (see below), whose sum is σ = 40472699660800. Its totient is φ = 18133186124160.

The previous prime is 28773811616867. The next prime is 28773811616911. The reversal of 28773811616889 is 98861611837782.

It is an interprime number because it is at equal distance from previous prime (28773811616867) and next prime (28773811616911).

It is not a de Polignac number, because 28773811616889 - 2¹⁷ = 28773811485817 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28773811616889.

It is not an unprimeable number, because it can be changed into a prime (28773811616819) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61618494 + ... + 62083704.

It is an arithmetic number, because the mean of its divisors is an integer number (1264771864400).

Almost surely, 2^{28773811616889} is an apocalyptic number.

It is an amenable number.

28773811616889 is a deficient number, since it is larger than the sum of its proper divisors (11698888043911).

28773811616889 is a wasteful number, since it uses less digits than its factorization.

28773811616889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467605.

The product of its digits is 390168576, while the sum is 75.

The spelling of 28773811616889 in words is "twenty-eight trillion, seven hundred seventy-three billion, eight hundred eleven million, six hundred sixteen thousand, eight hundred eighty-nine".