28642697 has 2 divisors, whose sum is σ = 28642698. Its totient is φ = 28642696.

The previous prime is 28642681. The next prime is 28642703. The reversal of 28642697 is 79624682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15217801 + 13424896 = 3901^2 + 3664^2 .

It is a cyclic number.

It is not a de Polignac number, because 28642697 - 2⁴ = 28642681 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28642657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14321348 + 14321349.

It is an arithmetic number, because the mean of its divisors is an integer number (14321349).

Almost surely, 2^28642697 is an apocalyptic number.

It is an amenable number.

28642697 is a deficient number, since it is larger than the sum of its proper divisors (1).

28642697 is an equidigital number, since it uses as much as digits as its factorization.

28642697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 44.

The square root of 28642697 is about 5351.8872372276. The cubic root of 28642697 is about 305.9646854315.

The spelling of 28642697 in words is "twenty-eight million, six hundred forty-two thousand, six hundred ninety-seven".