28078576771 has 12 divisors (see below), whose sum is σ = 33716475840. Its totient is φ = 23290984080.

The previous prime is 28078576763. The next prime is 28078576777. The reversal of 28078576771 is 17767587082.

It is not a de Polignac number, because 28078576771 - 2³ = 28078576763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28078576777) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9240936 + ... + 9243973.

It is an arithmetic number, because the mean of its divisors is an integer number (2809706320).

Almost surely, 2^28078576771 is an apocalyptic number.

28078576771 is a deficient number, since it is larger than the sum of its proper divisors (5637899069).

28078576771 is a wasteful number, since it uses less digits than its factorization.

28078576771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18484954 (or 18484947 counting only the distinct ones).

The product of its (nonzero) digits is 9219840, while the sum is 58.

The spelling of 28078576771 in words is "twenty-eight billion, seventy-eight million, five hundred seventy-six thousand, seven hundred seventy-one".