28863143 has 4 divisors (see below), whose sum is σ = 29133000. Its totient is φ = 28593288.

The previous prime is 28863119. The next prime is 28863151. The reversal of 28863143 is 34136882.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28863143 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 (28863173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134768 + ... + 134981.

It is an arithmetic number, because the mean of its divisors is an integer number (7283250).

Almost surely, 2^28863143 is an apocalyptic number.

28863143 is a deficient number, since it is larger than the sum of its proper divisors (269857).

28863143 is a wasteful number, since it uses less digits than its factorization.

28863143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269856.

The product of its digits is 27648, while the sum is 35.

The square root of 28863143 is about 5372.4429266396. The cubic root of 28863143 is about 306.7476236851.

The spelling of 28863143 in words is "twenty-eight million, eight hundred sixty-three thousand, one hundred forty-three".