28659767 has 4 divisors (see below), whose sum is σ = 28674360. Its totient is φ = 28645176.

The previous prime is 28659749. The next prime is 28659791. The reversal of 28659767 is 76795682.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28659767 - 2¹⁶ = 28594231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28650767) 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 in 3 ways as a sum of consecutive naturals, for example, 3788 + ... + 8465.

It is an arithmetic number, because the mean of its divisors is an integer number (7168590).

Almost surely, 2^28659767 is an apocalyptic number.

28659767 is a deficient number, since it is larger than the sum of its proper divisors (14593).

28659767 is a wasteful number, since it uses less digits than its factorization.

28659767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14592.

The product of its digits is 1270080, while the sum is 50.

The square root of 28659767 is about 5353.4817642353. The cubic root of 28659767 is about 306.0254546157.

The spelling of 28659767 in words is "twenty-eight million, six hundred fifty-nine thousand, seven hundred sixty-seven".