28059685 has 4 divisors (see below), whose sum is σ = 33671628. Its totient is φ = 22447744.

The previous prime is 28059683. The next prime is 28059709. The reversal of 28059685 is 58695082.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7935489 + 20124196 = 2817^2 + 4486^2 .

It is a cyclic number.

It is not a de Polignac number, because 28059685 - 2¹ = 28059683 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28059683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2805964 + ... + 2805973.

It is an arithmetic number, because the mean of its divisors is an integer number (8417907).

Almost surely, 2^28059685 is an apocalyptic number.

It is an amenable number.

28059685 is a deficient number, since it is larger than the sum of its proper divisors (5611943).

28059685 is an equidigital number, since it uses as much as digits as its factorization.

28059685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5611942.

The product of its (nonzero) digits is 172800, while the sum is 43.

The square root of 28059685 is about 5297.1393223135. The cubic root of 28059685 is about 303.8745045547.

The spelling of 28059685 in words is "twenty-eight million, fifty-nine thousand, six hundred eighty-five".