28806645 has 16 divisors (see below), whose sum is σ = 52675200. Its totient is φ = 13168704.

The previous prime is 28806623. The next prime is 28806667. The reversal of 28806645 is 54660882.

It is an interprime number because it is at equal distance from previous prime (28806623) and next prime (28806667).

It is not a de Polignac number, because 28806645 - 2⁸ = 28806389 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 137070 + ... + 137279.

It is an arithmetic number, because the mean of its divisors is an integer number (3292200).

Almost surely, 2^28806645 is an apocalyptic number.

It is an amenable number.

28806645 is a deficient number, since it is larger than the sum of its proper divisors (23868555).

28806645 is a wasteful number, since it uses less digits than its factorization.

28806645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274364.

The product of its (nonzero) digits is 92160, while the sum is 39.

The square root of 28806645 is about 5367.1822216131. The cubic root of 28806645 is about 306.5473458028.

The spelling of 28806645 in words is "twenty-eight million, eight hundred six thousand, six hundred forty-five".