28100020002 has 16 divisors (see below), whose sum is σ = 57395786112. Its totient is φ = 9167382320.

The previous prime is 28100019989. The next prime is 28100020073. The reversal of 28100020002 is 20002000182.

It is a super-2 number, since 2×28100020002² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49822449 + ... + 49823012.

It is an arithmetic number, because the mean of its divisors is an integer number (3587236632).

Almost surely, 2^28100020002 is an apocalyptic number.

28100020002 is an abundant number, since it is smaller than the sum of its proper divisors (29295766110).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28100020002 is a wasteful number, since it uses less digits than its factorization.

28100020002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99645513.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 28100020002 its reverse (20002000182), we get a palindrome (48102020184).

The spelling of 28100020002 in words is "twenty-eight billion, one hundred million, twenty thousand, two".