28084745 has 8 divisors (see below), whose sum is σ = 36294216. Its totient is φ = 20739456.

The previous prime is 28084741. The next prime is 28084769. The reversal of 28084745 is 54748082.

It can be written as a sum of positive squares in 4 ways, for example, as 121801 + 27962944 = 349^2 + 5288^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 28084745 - 2² = 28084741 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28084699 and 28084708.

It is not an unprimeable number, because it can be changed into a prime (28084741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 215972 + ... + 216101.

It is an arithmetic number, because the mean of its divisors is an integer number (4536777).

Almost surely, 2^28084745 is an apocalyptic number.

It is an amenable number.

28084745 is a deficient number, since it is larger than the sum of its proper divisors (8209471).

28084745 is a wasteful number, since it uses less digits than its factorization.

28084745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432091.

The product of its (nonzero) digits is 71680, while the sum is 38.

The square root of 28084745 is about 5299.5042220947. The cubic root of 28084745 is about 303.9649406995.

The spelling of 28084745 in words is "twenty-eight million, eighty-four thousand, seven hundred forty-five".