28087061 has 2 divisors, whose sum is σ = 28087062. Its totient is φ = 28087060.

The previous prime is 28087049. The next prime is 28087063. The reversal of 28087061 is 16078082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19272100 + 8814961 = 4390^2 + 2969^2 .

It is a cyclic number.

It is not a de Polignac number, because 28087061 - 2¹⁴ = 28070677 is a prime.

It is a Sophie Germain prime.

Together with 28087063, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28087063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14043530 + 14043531.

It is an arithmetic number, because the mean of its divisors is an integer number (14043531).

Almost surely, 2^28087061 is an apocalyptic number.

It is an amenable number.

28087061 is a deficient number, since it is larger than the sum of its proper divisors (1).

28087061 is an equidigital number, since it uses as much as digits as its factorization.

28087061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 28087061 is about 5299.7227285963. The cubic root of 28087061 is about 303.9732959288.

The spelling of 28087061 in words is "twenty-eight million, eighty-seven thousand, sixty-one".