28684065 has 16 divisors (see below), whose sum is σ = 47135808. Its totient is φ = 14884416.

The previous prime is 28684043. The next prime is 28684067. The reversal of 28684065 is 56048682.

28684065 = T₁₉₄ + T₁₉₅ + ... + T₅₆₃.

It is not a de Polignac number, because 28684065 - 2⁶ = 28684001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28684067) 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, 25287 + ... + 26396.

It is an arithmetic number, because the mean of its divisors is an integer number (2945988).

Almost surely, 2^28684065 is an apocalyptic number.

It is an amenable number.

28684065 is a deficient number, since it is larger than the sum of its proper divisors (18451743).

28684065 is a wasteful number, since it uses less digits than its factorization.

28684065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51728.

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

The square root of 28684065 is about 5355.7506476684. The cubic root of 28684065 is about 306.1119138683. Note that the first 3 decimals are identical.

The spelling of 28684065 in words is "twenty-eight million, six hundred eighty-four thousand, sixty-five".