28068445 has 8 divisors (see below), whose sum is σ = 35663544. Its totient is φ = 21133824.

The previous prime is 28068431. The next prime is 28068457. The reversal of 28068445 is 54486082.

It can be written as a sum of positive squares in 4 ways, for example, as 1473796 + 26594649 = 1214^2 + 5157^2 .

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 28068445 - 2⁵ = 28068413 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 165024 + ... + 165193.

It is an arithmetic number, because the mean of its divisors is an integer number (4457943).

Almost surely, 2^28068445 is an apocalyptic number.

It is an amenable number.

28068445 is a deficient number, since it is larger than the sum of its proper divisors (7595099).

28068445 is a wasteful number, since it uses less digits than its factorization.

28068445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330239.

The product of its (nonzero) digits is 61440, while the sum is 37.

The square root of 28068445 is about 5297.9661191820. The cubic root of 28068445 is about 303.9061236279.

The spelling of 28068445 in words is "twenty-eight million, sixty-eight thousand, four hundred forty-five".