28409767 has 2 divisors, whose sum is σ = 28409768. Its totient is φ = 28409766.

The previous prime is 28409753. The next prime is 28409783. The reversal of 28409767 is 76790482.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28409767 - 2⁷ = 28409639 is a prime.

It is a super-2 number, since 2×28409767² = 1614229721988578, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28409467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14204883 + 14204884.

It is an arithmetic number, because the mean of its divisors is an integer number (14204884).

Almost surely, 2^28409767 is an apocalyptic number.

28409767 is a deficient number, since it is larger than the sum of its proper divisors (1).

28409767 is an equidigital number, since it uses as much as digits as its factorization.

28409767 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 28409767 is about 5330.0813314620. The cubic root of 28409767 is about 305.1330316385.

The spelling of 28409767 in words is "twenty-eight million, four hundred nine thousand, seven hundred sixty-seven".