28021080706 has 16 divisors (see below), whose sum is σ = 42550401600. Its totient is φ = 13837711888.

The previous prime is 28021080701. The next prime is 28021080707. The reversal of 28021080706 is 60708012082.

It is not an unprimeable number, because it can be changed into a prime (28021080701) 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, 594660 + ... + 640048.

It is an arithmetic number, because the mean of its divisors is an integer number (2659400100).

Almost surely, 2^28021080706 is an apocalyptic number.

28021080706 is a deficient number, since it is larger than the sum of its proper divisors (14529320894).

28021080706 is a wasteful number, since it uses less digits than its factorization.

28021080706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49193.

The product of its (nonzero) digits is 10752, while the sum is 34.

Adding to 28021080706 its reverse (60708012082), we get a palindrome (88729092788).

The spelling of 28021080706 in words is "twenty-eight billion, twenty-one million, eighty thousand, seven hundred six".