28047685 has 8 divisors (see below), whose sum is σ = 33689376. Its totient is φ = 22416720.

The previous prime is 28047661. The next prime is 28047697. The reversal of 28047685 is 58674082.

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

It is not a de Polignac number, because 28047685 - 2²³ = 19659077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5170 + ... + 9100.

It is an arithmetic number, because the mean of its divisors is an integer number (4211172).

Almost surely, 2^28047685 is an apocalyptic number.

It is an amenable number.

28047685 is a deficient number, since it is larger than the sum of its proper divisors (5641691).

28047685 is a wasteful number, since it uses less digits than its factorization.

28047685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5363.

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 28047685 is about 5296.0065143464. The cubic root of 28047685 is about 303.8311800722.

The spelling of 28047685 in words is "twenty-eight million, forty-seven thousand, six hundred eighty-five".