28559977 has 2 divisors, whose sum is σ = 28559978. Its totient is φ = 28559976.

The previous prime is 28559969. The next prime is 28560019. The reversal of 28559977 is 77995582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24443136 + 4116841 = 4944^2 + 2029^2 .

It is a cyclic number.

It is not a de Polignac number, because 28559977 - 2³ = 28559969 is a prime.

It is not a weakly prime, because it can be changed into another prime (28559917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14279988 + 14279989.

It is an arithmetic number, because the mean of its divisors is an integer number (14279989).

Almost surely, 2^28559977 is an apocalyptic number.

It is an amenable number.

28559977 is a deficient number, since it is larger than the sum of its proper divisors (1).

28559977 is an equidigital number, since it uses as much as digits as its factorization.

28559977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1587600, while the sum is 52.

The square root of 28559977 is about 5344.1535344711. The cubic root of 28559977 is about 305.6698598147.

The spelling of 28559977 in words is "twenty-eight million, five hundred fifty-nine thousand, nine hundred seventy-seven".