28244071 has 4 divisors (see below), whose sum is σ = 28777032. Its totient is φ = 27711112.

The previous prime is 28244059. The next prime is 28244101. The reversal of 28244071 is 17044282.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17044282 = 2 ⋅8522141.

It is a cyclic number.

It is not a de Polignac number, because 28244071 - 2¹⁵ = 28211303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28244171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266401 + ... + 266506.

It is an arithmetic number, because the mean of its divisors is an integer number (7194258).

Almost surely, 2^28244071 is an apocalyptic number.

28244071 is a deficient number, since it is larger than the sum of its proper divisors (532961).

28244071 is an equidigital number, since it uses as much as digits as its factorization.

28244071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532960.

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 28244071 is about 5314.5151236966. The cubic root of 28244071 is about 304.5386593352.

The spelling of 28244071 in words is "twenty-eight million, two hundred forty-four thousand, seventy-one".