28245257 has 8 divisors (see below), whose sum is σ = 29140992. Its totient is φ = 27363600.

The previous prime is 28245253. The next prime is 28245263. The reversal of 28245257 is 75254282.

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 28245257 - 2² = 28245253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28245251) 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, 632 + ... + 7542.

It is an arithmetic number, because the mean of its divisors is an integer number (3642624).

Almost surely, 2^28245257 is an apocalyptic number.

It is an amenable number.

28245257 is a deficient number, since it is larger than the sum of its proper divisors (895735).

28245257 is an equidigital number, since it uses as much as digits as its factorization.

28245257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7039.

The product of its digits is 44800, while the sum is 35.

The square root of 28245257 is about 5314.6267037300. The cubic root of 28245257 is about 304.5429219147.

The spelling of 28245257 in words is "twenty-eight million, two hundred forty-five thousand, two hundred fifty-seven".