28860143 has 8 divisors (see below), whose sum is σ = 31667328. Its totient is φ = 26136864.

The previous prime is 28860131. The next prime is 28860157. The reversal of 28860143 is 34106882.

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

It is not a de Polignac number, because 28860143 - 2⁴ = 28860127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28860103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20255 + ... + 21632.

It is an arithmetic number, because the mean of its divisors is an integer number (3958416).

Almost surely, 2^28860143 is an apocalyptic number.

28860143 is a deficient number, since it is larger than the sum of its proper divisors (2807185).

28860143 is a wasteful number, since it uses less digits than its factorization.

28860143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41953.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 28860143 is about 5372.1637167905. The cubic root of 28860143 is about 306.7369956585.

The spelling of 28860143 in words is "twenty-eight million, eight hundred sixty thousand, one hundred forty-three".