28814835977 has 4 divisors (see below), whose sum is σ = 28815202836. Its totient is φ = 28814469120.

The previous prime is 28814835971. The next prime is 28814836051. The reversal of 28814835977 is 77953841882.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 19762455241 + 9052380736 = 140579^2 + 95144^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28814835977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28814835971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12548 + ... + 240389.

It is an arithmetic number, because the mean of its divisors is an integer number (7203800709).

Almost surely, 2^28814835977 is an apocalyptic number.

It is an amenable number.

28814835977 is a deficient number, since it is larger than the sum of its proper divisors (366859).

28814835977 is a wasteful number, since it uses less digits than its factorization.

28814835977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366858.

The product of its digits is 27095040, while the sum is 62.

The spelling of 28814835977 in words is "twenty-eight billion, eight hundred fourteen million, eight hundred thirty-five thousand, nine hundred seventy-seven".