28704601 has 2 divisors, whose sum is σ = 28704602. Its totient is φ = 28704600.

The previous prime is 28704593. The next prime is 28704629. The reversal of 28704601 is 10640782.

It is an a-pointer prime, because the next prime (28704629) can be obtained adding 28704601 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26255376 + 2449225 = 5124^2 + 1565^2 .

It is a cyclic number.

It is not a de Polignac number, because 28704601 - 2³ = 28704593 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28704601.

It is not a weakly prime, because it can be changed into another prime (28704631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14352300 + 14352301.

It is an arithmetic number, because the mean of its divisors is an integer number (14352301).

Almost surely, 2^28704601 is an apocalyptic number.

It is an amenable number.

28704601 is a deficient number, since it is larger than the sum of its proper divisors (1).

28704601 is an equidigital number, since it uses as much as digits as its factorization.

28704601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 28704601 is about 5357.6674962151. The cubic root of 28704601 is about 306.1849487822.

The spelling of 28704601 in words is "twenty-eight million, seven hundred four thousand, six hundred one".