28363691808 has 48 divisors (see below), whose sum is σ = 82727436960. Its totient is φ = 9454563648.

The previous prime is 28363691753. The next prime is 28363691819. The reversal of 28363691808 is 80819636382.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

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, 16413310 + ... + 16415037.

It is an arithmetic number, because the mean of its divisors is an integer number (1723488270).

Almost surely, 2^28363691808 is an apocalyptic number.

It is an amenable number.

28363691808 is an abundant number, since it is smaller than the sum of its proper divisors (54363745152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28363691808 is a wasteful number, since it uses less digits than its factorization.

28363691808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32828366 (or 32828352 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 54.

The spelling of 28363691808 in words is "twenty-eight billion, three hundred sixty-three million, six hundred ninety-one thousand, eight hundred eight".