28776147678 has 24 divisors (see below), whose sum is σ = 63048866400. Its totient is φ = 9484272864.

The previous prime is 28776147671. The next prime is 28776147689. The reversal of 28776147678 is 87674167782.

28776147678 is a `hidden beast` number, since 2 + 8 + 7 + 7 + 614 + 7 + 6 + 7 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28776147671) 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 11 ways as a sum of consecutive naturals, for example, 8979718 + ... + 8982921.

It is an arithmetic number, because the mean of its divisors is an integer number (2627036100).

Almost surely, 2^28776147678 is an apocalyptic number.

28776147678 is an abundant number, since it is smaller than the sum of its proper divisors (34272718722).

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

28776147678 is a wasteful number, since it uses less digits than its factorization.

28776147678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17962736 (or 17962733 counting only the distinct ones).

The product of its digits is 44255232, while the sum is 63.

The spelling of 28776147678 in words is "twenty-eight billion, seven hundred seventy-six million, one hundred forty-seven thousand, six hundred seventy-eight".