28866285772 has 12 divisors (see below), whose sum is σ = 50517787320. Its totient is φ = 14432632256.

The previous prime is 28866285761. The next prime is 28866285797. The reversal of 28866285772 is 27758266882.

It is a self number, because there is not a number n which added to its sum of digits gives 28866285772.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18003 + ... + 240949.

It is an arithmetic number, because the mean of its divisors is an integer number (4209815610).

Almost surely, 2^28866285772 is an apocalyptic number.

It is an amenable number.

28866285772 is a deficient number, since it is larger than the sum of its proper divisors (21651501548).

28866285772 is a wasteful number, since it uses less digits than its factorization.

28866285772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255320 (or 255318 counting only the distinct ones).

The product of its digits is 36126720, while the sum is 61.

The spelling of 28866285772 in words is "twenty-eight billion, eight hundred sixty-six million, two hundred eighty-five thousand, seven hundred seventy-two".