28028003055550 has 24 divisors (see below), whose sum is σ = 52144495520832. Its totient is φ = 11208532440000.

The previous prime is 28028003055539. The next prime is 28028003055553. The reversal of 28028003055550 is 5555030082082.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28028003055497 and 28028003055506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28028003055553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66507406 + ... + 66927505.

It is an arithmetic number, because the mean of its divisors is an integer number (2172687313368).

Almost surely, 2^{28028003055550} is an apocalyptic number.

28028003055550 is a deficient number, since it is larger than the sum of its proper divisors (24116492465282).

28028003055550 is a wasteful number, since it uses less digits than its factorization.

28028003055550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133439124 (or 133439119 counting only the distinct ones).

The product of its (nonzero) digits is 480000, while the sum is 43.

The spelling of 28028003055550 in words is "twenty-eight trillion, twenty-eight billion, three million, fifty-five thousand, five hundred fifty".