28366251 has 16 divisors (see below), whose sum is σ = 40197024. Its totient is φ = 17731584.

The previous prime is 28366249. The next prime is 28366279. The reversal of 28366251 is 15266382.

It is not a de Polignac number, because 28366251 - 2¹ = 28366249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28366201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15075 + ... + 16851.

It is an arithmetic number, because the mean of its divisors is an integer number (2512314).

Almost surely, 2^28366251 is an apocalyptic number.

28366251 is a deficient number, since it is larger than the sum of its proper divisors (11830773).

28366251 is a wasteful number, since it uses less digits than its factorization.

28366251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2110.

The product of its digits is 17280, while the sum is 33.

The square root of 28366251 is about 5325.9976530224. The cubic root of 28366251 is about 304.9771585510.

The spelling of 28366251 in words is "twenty-eight million, three hundred sixty-six thousand, two hundred fifty-one".