28842757 has 2 divisors, whose sum is σ = 28842758. Its totient is φ = 28842756.

The previous prime is 28842743. The next prime is 28842769. The reversal of 28842757 is 75724882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21520321 + 7322436 = 4639^2 + 2706^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28842757 is a prime.

It is a super-2 number, since 2×28842757² = 1663809262722098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28842707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14421378 + 14421379.

It is an arithmetic number, because the mean of its divisors is an integer number (14421379).

Almost surely, 2^28842757 is an apocalyptic number.

It is an amenable number.

28842757 is a deficient number, since it is larger than the sum of its proper divisors (1).

28842757 is an equidigital number, since it uses as much as digits as its factorization.

28842757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 250880, while the sum is 43.

The square root of 28842757 is about 5370.5453168184. The cubic root of 28842757 is about 306.6753881945.

The spelling of 28842757 in words is "twenty-eight million, eight hundred forty-two thousand, seven hundred fifty-seven".