28261087 has 2 divisors, whose sum is σ = 28261088. Its totient is φ = 28261086.

The previous prime is 28261073. The next prime is 28261133. The reversal of 28261087 is 78016282.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28261087 - 2¹¹ = 28259039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28261027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14130543 + 14130544.

It is an arithmetic number, because the mean of its divisors is an integer number (14130544).

Almost surely, 2^28261087 is an apocalyptic number.

28261087 is a deficient number, since it is larger than the sum of its proper divisors (1).

28261087 is an equidigital number, since it uses as much as digits as its factorization.

28261087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 28261087 is about 5316.1157812824. The cubic root of 28261087 is about 304.5998047878.

The spelling of 28261087 in words is "twenty-eight million, two hundred sixty-one thousand, eighty-seven".