28499057 has 2 divisors, whose sum is σ = 28499058. Its totient is φ = 28499056.

The previous prime is 28499041. The next prime is 28499071. The reversal of 28499057 is 75099482.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23902321 + 4596736 = 4889^2 + 2144^2 .

It is a cyclic number.

It is not a de Polignac number, because 28499057 - 2⁴ = 28499041 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 28498999 and 28499017.

It is not a weakly prime, because it can be changed into another prime (28499027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14249528 + 14249529.

It is an arithmetic number, because the mean of its divisors is an integer number (14249529).

Almost surely, 2^28499057 is an apocalyptic number.

It is an amenable number.

28499057 is a deficient number, since it is larger than the sum of its proper divisors (1).

28499057 is an equidigital number, since it uses as much as digits as its factorization.

28499057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 28499057 is about 5338.4508052430. The cubic root of 28499057 is about 305.4523682328.

The spelling of 28499057 in words is "twenty-eight million, four hundred ninety-nine thousand, fifty-seven".