28787973518 has 16 divisors (see below), whose sum is σ = 44751242880. Its totient is φ = 13872675936.

The previous prime is 28787973509. The next prime is 28787973521. The reversal of 28787973518 is 81537978782.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 413246 + ... + 477857.

It is an arithmetic number, because the mean of its divisors is an integer number (2796952680).

Almost surely, 2^28787973518 is an apocalyptic number.

28787973518 is a deficient number, since it is larger than the sum of its proper divisors (15963269362).

28787973518 is a wasteful number, since it uses less digits than its factorization.

28787973518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891691.

The product of its digits is 47416320, while the sum is 65.

The spelling of 28787973518 in words is "twenty-eight billion, seven hundred eighty-seven million, nine hundred seventy-three thousand, five hundred eighteen".