28948718737 has 4 divisors (see below), whose sum is σ = 28959056676. Its totient is φ = 28938380800.

The previous prime is 28948718693. The next prime is 28948718741. The reversal of 28948718737 is 73781784982.

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 18731754496 + 10216964241 = 136864^2 + 101079^2 .

It is a cyclic number.

It is not a de Polignac number, because 28948718737 - 2¹⁹ = 28948194449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28948718797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5164768 + ... + 5170369.

It is an arithmetic number, because the mean of its divisors is an integer number (7239764169).

Almost surely, 2^28948718737 is an apocalyptic number.

It is an amenable number.

28948718737 is a deficient number, since it is larger than the sum of its proper divisors (10337939).

28948718737 is a wasteful number, since it uses less digits than its factorization.

28948718737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10337938.

The product of its digits is 37933056, while the sum is 64.

The spelling of 28948718737 in words is "twenty-eight billion, nine hundred forty-eight million, seven hundred eighteen thousand, seven hundred thirty-seven".