28080697 has 2 divisors, whose sum is σ = 28080698. Its totient is φ = 28080696.

The previous prime is 28080683. The next prime is 28080707. The reversal of 28080697 is 79608082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28079401 + 1296 = 5299^2 + 36^2 .

It is a cyclic number.

It is not a de Polignac number, because 28080697 - 2¹¹ = 28078649 is a prime.

It is not a weakly prime, because it can be changed into another prime (28080607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14040348 + 14040349.

It is an arithmetic number, because the mean of its divisors is an integer number (14040349).

Almost surely, 2^28080697 is an apocalyptic number.

28080697 is the 2833-rd centered heptagonal number.

It is an amenable number.

28080697 is a deficient number, since it is larger than the sum of its proper divisors (1).

28080697 is an equidigital number, since it uses as much as digits as its factorization.

28080697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 28080697 is about 5299.1222858130. The cubic root of 28080697 is about 303.9503359832.

The spelling of 28080697 in words is "twenty-eight million, eighty thousand, six hundred ninety-seven".