28743143 has 32 divisors (see below), whose sum is σ = 36288000. Its totient is φ = 22377600.

The previous prime is 28743133. The next prime is 28743151. The reversal of 28743143 is 34134782.

It is a cyclic number.

It is not a de Polignac number, because 28743143 - 2⁶ = 28743079 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 (28743133) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 192833 + ... + 192981.

It is an arithmetic number, because the mean of its divisors is an integer number (1134000).

Almost surely, 2^28743143 is an apocalyptic number.

28743143 is a deficient number, since it is larger than the sum of its proper divisors (7544857).

28743143 is a wasteful number, since it uses less digits than its factorization.

28743143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263.

The product of its digits is 16128, while the sum is 32.

The square root of 28743143 is about 5361.2631907042. The cubic root of 28743143 is about 306.3219268514.

The spelling of 28743143 in words is "twenty-eight million, seven hundred forty-three thousand, one hundred forty-three".