28887459977 has 2 divisors, whose sum is σ = 28887459978. Its totient is φ = 28887459976.

The previous prime is 28887459971. The next prime is 28887460033. The reversal of 28887459977 is 77995478882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17175675136 + 11711784841 = 131056^2 + 108221^2 .

It is a cyclic number.

It is not a de Polignac number, because 28887459977 - 2⁸ = 28887459721 is a prime.

It is not a weakly prime, because it can be changed into another prime (28887459971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14443729988 + 14443729989.

It is an arithmetic number, because the mean of its divisors is an integer number (14443729989).

Almost surely, 2^28887459977 is an apocalyptic number.

It is an amenable number.

28887459977 is a deficient number, since it is larger than the sum of its proper divisors (1).

28887459977 is an equidigital number, since it uses as much as digits as its factorization.

28887459977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 568995840, while the sum is 74.

The spelling of 28887459977 in words is "twenty-eight billion, eight hundred eighty-seven million, four hundred fifty-nine thousand, nine hundred seventy-seven".