28180601 has 2 divisors, whose sum is σ = 28180602. Its totient is φ = 28180600.

The previous prime is 28180549. The next prime is 28180613. The reversal of 28180601 is 10608182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28090000 + 90601 = 5300^2 + 301^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28180601 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28180631) 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, 14090300 + 14090301.

It is an arithmetic number, because the mean of its divisors is an integer number (14090301).

Almost surely, 2^28180601 is an apocalyptic number.

It is an amenable number.

28180601 is a deficient number, since it is larger than the sum of its proper divisors (1).

28180601 is an equidigital number, since it uses as much as digits as its factorization.

28180601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 28180601 is about 5308.5403831939. The cubic root of 28180601 is about 304.3103687611.

Adding to 28180601 its reverse (10608182), we get a palindrome (38788783).

The spelling of 28180601 in words is "twenty-eight million, one hundred eighty thousand, six hundred one".