28647667 has 2 divisors, whose sum is σ = 28647668. Its totient is φ = 28647666.

The previous prime is 28647637. The next prime is 28647677. The reversal of 28647667 is 76674682.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28647667 - 2¹¹ = 28645619 is a prime.

It is a super-3 number, since 3×28647667³ (a number of 23 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (28647637) 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, 14323833 + 14323834.

It is an arithmetic number, because the mean of its divisors is an integer number (14323834).

Almost surely, 2^28647667 is an apocalyptic number.

28647667 is a deficient number, since it is larger than the sum of its proper divisors (1).

28647667 is an equidigital number, since it uses as much as digits as its factorization.

28647667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 677376, while the sum is 46.

The square root of 28647667 is about 5352.3515392769. The cubic root of 28647667 is about 305.9823811178.

The spelling of 28647667 in words is "twenty-eight million, six hundred forty-seven thousand, six hundred sixty-seven".