28749217036 has 24 divisors (see below), whose sum is σ = 50816342304. Its totient is φ = 14230354560.

The previous prime is 28749217031. The next prime is 28749217039. The reversal of 28749217036 is 63071294782.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28749217031) 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 7 ways as a sum of consecutive naturals, for example, 1470606 + ... + 1490026.

It is an arithmetic number, because the mean of its divisors is an integer number (2117347596).

Almost surely, 2^28749217036 is an apocalyptic number.

It is an amenable number.

28749217036 is a deficient number, since it is larger than the sum of its proper divisors (22067125268).

28749217036 is a wasteful number, since it uses less digits than its factorization.

28749217036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23121 (or 23119 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 49.

The spelling of 28749217036 in words is "twenty-eight billion, seven hundred forty-nine million, two hundred seventeen thousand, thirty-six".