28228226884664 has 32 divisors (see below), whose sum is σ = 56041658153280. Its totient is φ = 13283794351104.

The previous prime is 28228226884639. The next prime is 28228226884687. The reversal of 28228226884664 is 46648862282282.

It is a Harshad number since it is a multiple of its sum of digits (68).

It is a junction number, because it is equal to n+sod(n) for n = 28228226884594 and 28228226884603.

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, 27819089 + ... + 28815935.

It is an arithmetic number, because the mean of its divisors is an integer number (1751301817290).

Almost surely, 2^{28228226884664} is an apocalyptic number.

It is an amenable number.

28228226884664 is a deficient number, since it is larger than the sum of its proper divisors (27813431268616).

28228226884664 is a wasteful number, since it uses less digits than its factorization.

28228226884664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1205087 (or 1205083 counting only the distinct ones).

The product of its digits is 452984832, while the sum is 68.

The spelling of 28228226884664 in words is "twenty-eight trillion, two hundred twenty-eight billion, two hundred twenty-six million, eight hundred eighty-four thousand, six hundred sixty-four".