28246445 has 12 divisors (see below), whose sum is σ = 35775900. Its totient is φ = 21406464.

The previous prime is 28246409. The next prime is 28246453. The reversal of 28246445 is 54464282.

It can be written as a sum of positive squares in 2 ways, for example, as 7279204 + 20967241 = 2698^2 + 4579^2 .

It is not a de Polignac number, because 28246445 - 2⁸ = 28246189 is a prime.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 6020 + ... + 9629.

It is an arithmetic number, because the mean of its divisors is an integer number (2981325).

Almost surely, 2^28246445 is an apocalyptic number.

It is an amenable number.

28246445 is a deficient number, since it is larger than the sum of its proper divisors (7529455).

28246445 is a wasteful number, since it uses less digits than its factorization.

28246445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15692 (or 15673 counting only the distinct ones).

The product of its digits is 61440, while the sum is 35.

The square root of 28246445 is about 5314.7384695768. The cubic root of 28246445 is about 304.5471915628.

The spelling of 28246445 in words is "twenty-eight million, two hundred forty-six thousand, four hundred forty-five".