28757977 has 2 divisors, whose sum is σ = 28757978. Its totient is φ = 28757976.

The previous prime is 28757969. The next prime is 28758011. The reversal of 28757977 is 77975782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25441936 + 3316041 = 5044^2 + 1821^2 .

It is a cyclic number.

It is not a de Polignac number, because 28757977 - 2³ = 28757969 is a prime.

It is a super-2 number, since 2×28757977² = 1654042482265058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28757077) 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 as a sum of consecutive naturals, namely, 14378988 + 14378989.

It is an arithmetic number, because the mean of its divisors is an integer number (14378989).

Almost surely, 2^28757977 is an apocalyptic number.

It is an amenable number.

28757977 is a deficient number, since it is larger than the sum of its proper divisors (1).

28757977 is an equidigital number, since it uses as much as digits as its factorization.

28757977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728720, while the sum is 52.

The square root of 28757977 is about 5362.6464548765. The cubic root of 28757977 is about 306.3746141768.

The spelling of 28757977 in words is "twenty-eight million, seven hundred fifty-seven thousand, nine hundred seventy-seven".