28055030778 has 16 divisors (see below), whose sum is σ = 62344512960. Its totient is φ = 9351676908.

The previous prime is 28055030761. The next prime is 28055030779. The reversal of 28055030778 is 87703055082.

28055030778 is a `hidden beast` number, since 28 + 0 + 550 + 3 + 0 + 7 + 78 = 666.

It is not an unprimeable number, because it can be changed into a prime (28055030779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 259768750 + ... + 259768857.

It is an arithmetic number, because the mean of its divisors is an integer number (3896532060).

Almost surely, 2^28055030778 is an apocalyptic number.

28055030778 is an abundant number, since it is smaller than the sum of its proper divisors (34289482182).

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

28055030778 is a wasteful number, since it uses less digits than its factorization.

28055030778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519537618 (or 519537612 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 45.

The spelling of 28055030778 in words is "twenty-eight billion, fifty-five million, thirty thousand, seven hundred seventy-eight".