28011773566 has 8 divisors (see below), whose sum is σ = 48020183280. Its totient is φ = 12005045808.

The previous prime is 28011773563. The next prime is 28011773567. The reversal of 28011773566 is 66537711082.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28011773563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1000420471 + ... + 1000420498.

It is an arithmetic number, because the mean of its divisors is an integer number (6002522910).

Almost surely, 2^28011773566 is an apocalyptic number.

28011773566 is a deficient number, since it is larger than the sum of its proper divisors (20008409714).

28011773566 is a wasteful number, since it uses less digits than its factorization.

28011773566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2000840978.

The product of its (nonzero) digits is 423360, while the sum is 46.

The spelling of 28011773566 in words is "twenty-eight billion, eleven million, seven hundred seventy-three thousand, five hundred sixty-six".