28806769 has 8 divisors (see below), whose sum is σ = 29338848. Its totient is φ = 28279680.

The previous prime is 28806761. The next prime is 28806779. The reversal of 28806769 is 96760882.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28806769 - 2³ = 28806761 is a prime.

It is a super-2 number, since 2×28806769² = 1659659880438722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28806761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11574 + ... + 13840.

It is an arithmetic number, because the mean of its divisors is an integer number (3667356).

Almost surely, 2^28806769 is an apocalyptic number.

It is an amenable number.

28806769 is a deficient number, since it is larger than the sum of its proper divisors (532079).

28806769 is a wasteful number, since it uses less digits than its factorization.

28806769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2495.

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 28806769 is about 5367.1937732860. The cubic root of 28806769 is about 306.5477856529.

The spelling of 28806769 in words is "twenty-eight million, eight hundred six thousand, seven hundred sixty-nine".