28258143 has 16 divisors (see below), whose sum is σ = 39846912. Its totient is φ = 17784000.

The previous prime is 28258129. The next prime is 28258157. The reversal of 28258143 is 34185282.

It is an interprime number because it is at equal distance from previous prime (28258129) and next prime (28258157).

It is not a de Polignac number, because 28258143 - 2¹² = 28254047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28258163) 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, 108 + ... + 7518.

It is an arithmetic number, because the mean of its divisors is an integer number (2490432).

Almost surely, 2^28258143 is an apocalyptic number.

28258143 is a deficient number, since it is larger than the sum of its proper divisors (11588769).

28258143 is a wasteful number, since it uses less digits than its factorization.

28258143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7486.

The product of its digits is 15360, while the sum is 33.

The square root of 28258143 is about 5315.8388801769. The cubic root of 28258143 is about 304.5892275471.

The spelling of 28258143 in words is "twenty-eight million, two hundred fifty-eight thousand, one hundred forty-three".