28012728910 has 32 divisors (see below), whose sum is σ = 50711663520. Its totient is φ = 11141108352.

The previous prime is 28012728899. The next prime is 28012728929. The reversal of 28012728910 is 1982721082.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1247361 + ... + 1269619.

It is an arithmetic number, because the mean of its divisors is an integer number (1584739485).

Almost surely, 2^28012728910 is an apocalyptic number.

28012728910 is a deficient number, since it is larger than the sum of its proper divisors (22698934610).

28012728910 is a wasteful number, since it uses less digits than its factorization.

28012728910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22980.

The product of its (nonzero) digits is 32256, while the sum is 40.

It can be divided in two parts, 2801272 and 8910, that added together give a palindrome (2810182).

The spelling of 28012728910 in words is "twenty-eight billion, twelve million, seven hundred twenty-eight thousand, nine hundred ten".