28857701 has 2 divisors, whose sum is σ = 28857702. Its totient is φ = 28857700.

The previous prime is 28857643. The next prime is 28857733. The reversal of 28857701 is 10775882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23049601 + 5808100 = 4801^2 + 2410^2 .

It is a cyclic number.

It is not a de Polignac number, because 28857701 - 2¹⁰ = 28856677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28857781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14428850 + 14428851.

It is an arithmetic number, because the mean of its divisors is an integer number (14428851).

Almost surely, 2^28857701 is an apocalyptic number.

It is an amenable number.

28857701 is a deficient number, since it is larger than the sum of its proper divisors (1).

28857701 is an equidigital number, since it uses as much as digits as its factorization.

28857701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 28857701 is about 5371.9364292590. The cubic root of 28857701 is about 306.7283439010.

The spelling of 28857701 in words is "twenty-eight million, eight hundred fifty-seven thousand, seven hundred one".