28806767 has 4 divisors (see below), whose sum is σ = 31425576. Its totient is φ = 26187960.

The previous prime is 28806761. The next prime is 28806779. The reversal of 28806767 is 76760882.

It is a happy number.

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 28806767 - 2¹² = 28802671 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 (28806761) 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 in 3 ways as a sum of consecutive naturals, for example, 1309388 + ... + 1309409.

It is an arithmetic number, because the mean of its divisors is an integer number (7856394).

Almost surely, 2^28806767 is an apocalyptic number.

28806767 is a deficient number, since it is larger than the sum of its proper divisors (2618809).

28806767 is a wasteful number, since it uses less digits than its factorization.

28806767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2618808.

The product of its (nonzero) digits is 225792, while the sum is 44.

The square root of 28806767 is about 5367.1935869689. The cubic root of 28806767 is about 306.5477785585.

The spelling of 28806767 in words is "twenty-eight million, eight hundred six thousand, seven hundred sixty-seven".