28161677 has 2 divisors, whose sum is σ = 28161678. Its totient is φ = 28161676.

The previous prime is 28161659. The next prime is 28161691. The reversal of 28161677 is 77616182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23755876 + 4405801 = 4874^2 + 2099^2 .

It is a cyclic number.

It is not a de Polignac number, because 28161677 - 2⁸ = 28161421 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28161677.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28161277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14080838 + 14080839.

It is an arithmetic number, because the mean of its divisors is an integer number (14080839).

Almost surely, 2^28161677 is an apocalyptic number.

It is an amenable number.

28161677 is a deficient number, since it is larger than the sum of its proper divisors (1).

28161677 is an equidigital number, since it uses as much as digits as its factorization.

28161677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 38.

The square root of 28161677 is about 5306.7576730052. The cubic root of 28161677 is about 304.2422360888.

The spelling of 28161677 in words is "twenty-eight million, one hundred sixty-one thousand, six hundred seventy-seven".