5728945 has 4 divisors (see below), whose sum is σ = 6874740. Its totient is φ = 4583152.

The previous prime is 5728939. The next prime is 5728991. The reversal of 5728945 is 5498275.

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 3381921 + 2347024 = 1839^2 + 1532^2 .

It is a cyclic number.

It is not a de Polignac number, because 5728945 - 2⁵ = 5728913 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 5728898 and 5728907.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 572890 + ... + 572899.

It is an arithmetic number, because the mean of its divisors is an integer number (1718685).

Almost surely, 2^5728945 is an apocalyptic number.

It is an amenable number.

5728945 is a deficient number, since it is larger than the sum of its proper divisors (1145795).

5728945 is a wasteful number, since it uses less digits than its factorization.

5728945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1145794.

The product of its digits is 100800, while the sum is 40.

The square root of 5728945 is about 2393.5214642865. The cubic root of 5728945 is about 178.9334563260.

The spelling of 5728945 in words is "five million, seven hundred twenty-eight thousand, nine hundred forty-five".