28828057 has 2 divisors, whose sum is σ = 28828058. Its totient is φ = 28828056.

The previous prime is 28828031. The next prime is 28828067. The reversal of 28828057 is 75082882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18974736 + 9853321 = 4356^2 + 3139^2 .

It is a cyclic number.

It is not a de Polignac number, because 28828057 - 2¹¹ = 28826009 is a prime.

It is not a weakly prime, because it can be changed into another prime (28828067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14414028 + 14414029.

It is an arithmetic number, because the mean of its divisors is an integer number (14414029).

Almost surely, 2^28828057 is an apocalyptic number.

It is an amenable number.

28828057 is a deficient number, since it is larger than the sum of its proper divisors (1).

28828057 is an equidigital number, since it uses as much as digits as its factorization.

28828057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 71680, while the sum is 40.

The square root of 28828057 is about 5369.1765662902. The cubic root of 28828057 is about 306.6232792798.

The spelling of 28828057 in words is "twenty-eight million, eight hundred twenty-eight thousand, fifty-seven".