28711687 has 2 divisors, whose sum is σ = 28711688. Its totient is φ = 28711686.

The previous prime is 28711651. The next prime is 28711723. The reversal of 28711687 is 78611782.

It is a balanced prime because it is at equal distance from previous prime (28711651) and next prime (28711723).

It is a cyclic number.

It is not a de Polignac number, because 28711687 - 2¹⁵ = 28678919 is a prime.

It is a super-3 number, since 3×28711687³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28711607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14355843 + 14355844.

It is an arithmetic number, because the mean of its divisors is an integer number (14355844).

Almost surely, 2^28711687 is an apocalyptic number.

28711687 is a deficient number, since it is larger than the sum of its proper divisors (1).

28711687 is an equidigital number, since it uses as much as digits as its factorization.

28711687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37632, while the sum is 40.

The square root of 28711687 is about 5358.3287506460. The cubic root of 28711687 is about 306.2101415848.

The spelling of 28711687 in words is "twenty-eight million, seven hundred eleven thousand, six hundred eighty-seven".