28705853 has 16 divisors (see below), whose sum is σ = 32736960. Its totient is φ = 24960880.

The previous prime is 28705847. The next prime is 28705891. The reversal of 28705853 is 35850782.

It is not a de Polignac number, because 28705853 - 2¹⁴ = 28689469 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28705253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 268226 + ... + 268332.

It is an arithmetic number, because the mean of its divisors is an integer number (2046060).

Almost surely, 2^28705853 is an apocalyptic number.

It is an amenable number.

28705853 is a deficient number, since it is larger than the sum of its proper divisors (4031107).

28705853 is an equidigital number, since it uses as much as digits as its factorization.

28705853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205 (or 147 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 38.

The square root of 28705853 is about 5357.7843368318. The cubic root of 28705853 is about 306.1894003100.

Subtracting 28705853 from its reverse (35850782), we obtain a square (7144929 = 2673²).

The spelling of 28705853 in words is "twenty-eight million, seven hundred five thousand, eight hundred fifty-three".