28321217002 has 16 divisors (see below), whose sum is σ = 45791182080. Its totient is φ = 13059466992.

The previous prime is 28321216999. The next prime is 28321217009. The reversal of 28321217002 is 20071212382.

It is not an unprimeable number, because it can be changed into a prime (28321217009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 465102 + ... + 522457.

It is an arithmetic number, because the mean of its divisors is an integer number (2861948880).

Almost surely, 2^28321217002 is an apocalyptic number.

28321217002 is a deficient number, since it is larger than the sum of its proper divisors (17469965078).

28321217002 is a wasteful number, since it uses less digits than its factorization.

28321217002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988677.

The product of its (nonzero) digits is 2688, while the sum is 28.

Adding to 28321217002 its reverse (20071212382), we get a palindrome (48392429384).

The spelling of 28321217002 in words is "twenty-eight billion, three hundred twenty-one million, two hundred seventeen thousand, two".