28028055555 has 48 divisors (see below), whose sum is σ = 50046713184. Its totient is φ = 14500062720.

The previous prime is 28028055541. The next prime is 28028055557. The reversal of 28028055555 is 55555082082.

28028055555 is a `hidden beast` number, since 28 + 0 + 28 + 0 + 55 + 555 = 666.

It is not a de Polignac number, because 28028055555 - 2¹³ = 28028047363 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 28028055555.

It is not an unprimeable number, because it can be changed into a prime (28028055557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 525687 + ... + 576543.

It is an arithmetic number, because the mean of its divisors is an integer number (1042639858).

Almost surely, 2^28028055555 is an apocalyptic number.

28028055555 is a deficient number, since it is larger than the sum of its proper divisors (22018657629).

28028055555 is a wasteful number, since it uses less digits than its factorization.

28028055555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51236 (or 51233 counting only the distinct ones).

The product of its (nonzero) digits is 800000, while the sum is 45.

The spelling of 28028055555 in words is "twenty-eight billion, twenty-eight million, fifty-five thousand, five hundred fifty-five".