28224668492009 has 16 divisors (see below), whose sum is σ = 32603369584896. Its totient is φ = 24148253817600.

The previous prime is 28224668491951. The next prime is 28224668492029. The reversal of 28224668492009 is 90029486642282.

It is a de Polignac number, because none of the positive numbers 2^k-28224668492009 is a prime.

It is a super-2 number, since 2×28224668492009² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28224668492029) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 64064 + ... + 7513550.

It is an arithmetic number, because the mean of its divisors is an integer number (2037710599056).

Almost surely, 2^{28224668492009} is an apocalyptic number.

It is an amenable number.

28224668492009 is a deficient number, since it is larger than the sum of its proper divisors (4378701092887).

28224668492009 is a wasteful number, since it uses less digits than its factorization.

28224668492009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7469776.

The product of its (nonzero) digits is 47775744, while the sum is 62.

The spelling of 28224668492009 in words is "twenty-eight trillion, two hundred twenty-four billion, six hundred sixty-eight million, four hundred ninety-two thousand, nine".