28544685 has 16 divisors (see below), whose sum is σ = 49185024. Its totient is φ = 14052672.

The previous prime is 28544657. The next prime is 28544693. The reversal of 28544685 is 58644582.

It is not a de Polignac number, because 28544685 - 2⁸ = 28544429 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72997 + ... + 73386.

It is an arithmetic number, because the mean of its divisors is an integer number (3074064).

Almost surely, 2^28544685 is an apocalyptic number.

It is an amenable number.

28544685 is a deficient number, since it is larger than the sum of its proper divisors (20640339).

28544685 is a wasteful number, since it uses less digits than its factorization.

28544685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146404.

The product of its digits is 307200, while the sum is 42.

The square root of 28544685 is about 5342.7226205372. The cubic root of 28544685 is about 305.6152946680.

The spelling of 28544685 in words is "twenty-eight million, five hundred forty-four thousand, six hundred eighty-five".