28385116456 has 32 divisors (see below), whose sum is σ = 54415059840. Its totient is φ = 13875107328.

The previous prime is 28385116423. The next prime is 28385116493. The reversal of 28385116456 is 65461158382.

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, 299416 + ... + 382648.

It is an arithmetic number, because the mean of its divisors is an integer number (1700470620).

Almost surely, 2^28385116456 is an apocalyptic number.

It is an amenable number.

28385116456 is a deficient number, since it is larger than the sum of its proper divisors (26029943384).

28385116456 is a wasteful number, since it uses less digits than its factorization.

28385116456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84193 (or 84189 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 49.

The spelling of 28385116456 in words is "twenty-eight billion, three hundred eighty-five million, one hundred sixteen thousand, four hundred fifty-six".