28800228644 has 12 divisors (see below), whose sum is σ = 54982254768. Its totient is φ = 13091013000.

The previous prime is 28800228617. The next prime is 28800228647. The reversal of 28800228644 is 44682200882.

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 654550651 = 28800228644 / (2 + 8 + 8 + 0 + 0 + 2 + 2 + 8 + 6 + 4 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 28800228595 and 28800228604.

It is not an unprimeable number, because it can be changed into a prime (28800228647) 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, 327275282 + ... + 327275369.

It is an arithmetic number, because the mean of its divisors is an integer number (4581854564).

Almost surely, 2^28800228644 is an apocalyptic number.

It is an amenable number.

28800228644 is a deficient number, since it is larger than the sum of its proper divisors (26182026124).

28800228644 is a wasteful number, since it uses less digits than its factorization.

28800228644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654550666 (or 654550664 counting only the distinct ones).

The product of its (nonzero) digits is 393216, while the sum is 44.

The spelling of 28800228644 in words is "twenty-eight billion, eight hundred million, two hundred twenty-eight thousand, six hundred forty-four".