28764518885 has 8 divisors (see below), whose sum is σ = 34525587096. Its totient is φ = 23006172160.

The previous prime is 28764518851. The next prime is 28764518897. The reversal of 28764518885 is 58881546782.

It can be written as a sum of positive squares in 4 ways, for example, as 13966039684 + 14798479201 = 118178^2 + 121649^2 .

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

It is not a de Polignac number, because 28764518885 - 2⁶ = 28764518821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 657044 + ... + 699453.

It is an arithmetic number, because the mean of its divisors is an integer number (4315698387).

Almost surely, 2^28764518885 is an apocalyptic number.

It is an amenable number.

28764518885 is a deficient number, since it is larger than the sum of its proper divisors (5761068211).

28764518885 is a wasteful number, since it uses less digits than its factorization.

28764518885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360743.

The product of its digits is 34406400, while the sum is 62.

The spelling of 28764518885 in words is "twenty-eight billion, seven hundred sixty-four million, five hundred eighteen thousand, eight hundred eighty-five".