28542785977 has 8 divisors (see below), whose sum is σ = 29027830752. Its totient is φ = 28059477600.

The previous prime is 28542785969. The next prime is 28542785989. The reversal of 28542785977 is 77958724582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28542785977 - 2³ = 28542785969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28542788977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 400924 + ... + 466717.

It is an arithmetic number, because the mean of its divisors is an integer number (3628478844).

Almost surely, 2^28542785977 is an apocalyptic number.

It is an amenable number.

28542785977 is a deficient number, since it is larger than the sum of its proper divisors (485044775).

28542785977 is an equidigital number, since it uses as much as digits as its factorization.

28542785977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868199.

The product of its digits is 79027200, while the sum is 64.

The spelling of 28542785977 in words is "twenty-eight billion, five hundred forty-two million, seven hundred eighty-five thousand, nine hundred seventy-seven".