28748974901 has 4 divisors (see below), whose sum is σ = 28852762092. Its totient is φ = 28645187712.

The previous prime is 28748974847. The next prime is 28748974937. The reversal of 28748974901 is 10947984782.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15512702500 + 13236272401 = 124550^2 + 115049^2 .

It is a cyclic number.

It is not a de Polignac number, because 28748974901 - 2¹⁸ = 28748712757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28748976901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51893180 + ... + 51893733.

It is an arithmetic number, because the mean of its divisors is an integer number (7213190523).

Almost surely, 2^28748974901 is an apocalyptic number.

It is an amenable number.

28748974901 is a deficient number, since it is larger than the sum of its proper divisors (103787191).

28748974901 is a wasteful number, since it uses less digits than its factorization.

28748974901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103787190.

The product of its (nonzero) digits is 8128512, while the sum is 59.

The spelling of 28748974901 in words is "twenty-eight billion, seven hundred forty-eight million, nine hundred seventy-four thousand, nine hundred one".