28663884773 has 8 divisors (see below), whose sum is σ = 30351989592. Its totient is φ = 26976001536.

The previous prime is 28663884679. The next prime is 28663884787. The reversal of 28663884773 is 37748836682.

It can be written as a sum of positive squares in 4 ways, for example, as 729108004 + 27934776769 = 27002^2 + 167137^2 .

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 28663884773 - 2⁸ = 28663884517 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 (28663884173) 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, 263411 + ... + 355967.

It is an arithmetic number, because the mean of its divisors is an integer number (3793998699).

Almost surely, 2^28663884773 is an apocalyptic number.

It is an amenable number.

28663884773 is a deficient number, since it is larger than the sum of its proper divisors (1688104819).

28663884773 is a wasteful number, since it uses less digits than its factorization.

28663884773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110791.

The product of its digits is 65028096, while the sum is 62.

The spelling of 28663884773 in words is "twenty-eight billion, six hundred sixty-three million, eight hundred eighty-four thousand, seven hundred seventy-three".