28751813836 has 6 divisors (see below), whose sum is σ = 50315674220. Its totient is φ = 14375906916.

The previous prime is 28751813833. The next prime is 28751813851. The reversal of 28751813836 is 63831815782.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28751813833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3593976726 + ... + 3593976733.

Almost surely, 2^28751813836 is an apocalyptic number.

It is an amenable number.

28751813836 is a deficient number, since it is larger than the sum of its proper divisors (21563860384).

28751813836 is a wasteful number, since it uses less digits than its factorization.

28751813836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7187953463 (or 7187953461 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 52.

The spelling of 28751813836 in words is "twenty-eight billion, seven hundred fifty-one million, eight hundred thirteen thousand, eight hundred thirty-six".