28738673793 has 24 divisors (see below), whose sum is σ = 42758189760. Its totient is φ = 18589586400.

The previous prime is 28738673767. The next prime is 28738673807. The reversal of 28738673793 is 39737683782.

It is not a de Polignac number, because 28738673793 - 2⁶ = 28738673729 is a prime.

It is a super-2 number, since 2×28738673793² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28738673793.

It is not an unprimeable number, because it can be changed into a prime (28738674793) 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 23 ways as a sum of consecutive naturals, for example, 187458 + ... + 304331.

It is an arithmetic number, because the mean of its divisors is an integer number (1781591240).

Almost surely, 2^28738673793 is an apocalyptic number.

It is an amenable number.

28738673793 is a deficient number, since it is larger than the sum of its proper divisors (14019515967).

28738673793 is a wasteful number, since it uses less digits than its factorization.

28738673793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491989 (or 491986 counting only the distinct ones).

The product of its digits is 64012032, while the sum is 63.

The spelling of 28738673793 in words is "twenty-eight billion, seven hundred thirty-eight million, six hundred seventy-three thousand, seven hundred ninety-three".