28751730808 has 16 divisors (see below), whose sum is σ = 53935357680. Its totient is φ = 14368968768.

The previous prime is 28751730803. The next prime is 28751730857. The reversal of 28751730808 is 80803715782.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28751730803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 844341 + ... + 877732.

It is an arithmetic number, because the mean of its divisors is an integer number (3370959855).

Almost surely, 2^28751730808 is an apocalyptic number.

It is an amenable number.

28751730808 is a deficient number, since it is larger than the sum of its proper divisors (25183626872).

28751730808 is a wasteful number, since it uses less digits than its factorization.

28751730808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1724166 (or 1724162 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 49.

The spelling of 28751730808 in words is "twenty-eight billion, seven hundred fifty-one million, seven hundred thirty thousand, eight hundred eight".