28142797 has 2 divisors, whose sum is σ = 28142798. Its totient is φ = 28142796.

The previous prime is 28142791. The next prime is 28142809. The reversal of 28142797 is 79724182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20196036 + 7946761 = 4494^2 + 2819^2 .

It is a cyclic number.

It is not a de Polignac number, because 28142797 - 2¹⁹ = 27618509 is a prime.

It is a Chen prime.

It is equal to p_1749766 and since 28142797 and 1749766 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28142791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14071398 + 14071399.

It is an arithmetic number, because the mean of its divisors is an integer number (14071399).

Almost surely, 2^28142797 is an apocalyptic number.

It is an amenable number.

28142797 is a deficient number, since it is larger than the sum of its proper divisors (1).

28142797 is an equidigital number, since it uses as much as digits as its factorization.

28142797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 40.

The square root of 28142797 is about 5304.9785107953. The cubic root of 28142797 is about 304.1742314084.

The spelling of 28142797 in words is "twenty-eight million, one hundred forty-two thousand, seven hundred ninety-seven".