28743171 has 4 divisors (see below), whose sum is σ = 38324232. Its totient is φ = 19162112.

The previous prime is 28743167. The next prime is 28743203. The reversal of 28743171 is 17134782.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 28743171 - 2² = 28743167 is a prime.

It is a super-3 number, since 3×28743171³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (28743131) 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, 4790526 + ... + 4790531.

It is an arithmetic number, because the mean of its divisors is an integer number (9581058).

Almost surely, 2^28743171 is an apocalyptic number.

28743171 is a deficient number, since it is larger than the sum of its proper divisors (9581061).

28743171 is an equidigital number, since it uses as much as digits as its factorization.

28743171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9581060.

The product of its digits is 9408, while the sum is 33.

The square root of 28743171 is about 5361.2658020285. The cubic root of 28743171 is about 306.3220263187.

The spelling of 28743171 in words is "twenty-eight million, seven hundred forty-three thousand, one hundred seventy-one".