28044257 has 8 divisors (see below), whose sum is σ = 28605696. Its totient is φ = 27487152.

The previous prime is 28044253. The next prime is 28044259. The reversal of 28044257 is 75244082.

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

It is not a de Polignac number, because 28044257 - 2² = 28044253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28044253) 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, 14003 + ... + 15879.

It is an arithmetic number, because the mean of its divisors is an integer number (3575712).

Almost surely, 2^28044257 is an apocalyptic number.

It is an amenable number.

28044257 is a deficient number, since it is larger than the sum of its proper divisors (561439).

28044257 is a wasteful number, since it uses less digits than its factorization.

28044257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2167.

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 28044257 is about 5295.6828643717. The cubic root of 28044257 is about 303.8188014425.

The spelling of 28044257 in words is "twenty-eight million, forty-four thousand, two hundred fifty-seven".