28228009895 has 4 divisors (see below), whose sum is σ = 33873611880. Its totient is φ = 22582407912.

The previous prime is 28228009883. The next prime is 28228009897. The reversal of 28228009895 is 59890082282.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 59890082282 = 2 ⋅29945041141.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28228009895 is a prime.

It is a super-2 number, since 2×28228009895² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28228009897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2822800985 + ... + 2822800994.

It is an arithmetic number, because the mean of its divisors is an integer number (8468402970).

Almost surely, 2^28228009895 is an apocalyptic number.

28228009895 is a deficient number, since it is larger than the sum of its proper divisors (5645601985).

28228009895 is an equidigital number, since it uses as much as digits as its factorization.

28228009895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5645601984.

The product of its (nonzero) digits is 1658880, while the sum is 53.

The spelling of 28228009895 in words is "twenty-eight billion, two hundred twenty-eight million, nine thousand, eight hundred ninety-five".