28863251 has 8 divisors (see below), whose sum is σ = 29526000. Its totient is φ = 28207872.

The previous prime is 28863239. The next prime is 28863269. The reversal of 28863251 is 15236882.

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 28863251 - 2¹⁰ = 28862227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28863281) by changing a digit.

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, 6500 + ... + 9998.

It is an arithmetic number, because the mean of its divisors is an integer number (3690750).

Almost surely, 2^28863251 is an apocalyptic number.

28863251 is a deficient number, since it is larger than the sum of its proper divisors (662749).

28863251 is a wasteful number, since it uses less digits than its factorization.

28863251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3685.

The product of its digits is 23040, while the sum is 35.

The square root of 28863251 is about 5372.4529779236. The cubic root of 28863251 is about 306.7480062803.

The spelling of 28863251 in words is "twenty-eight million, eight hundred sixty-three thousand, two hundred fifty-one".