28347871 has 8 divisors (see below), whose sum is σ = 28867104. Its totient is φ = 27832320.

The previous prime is 28347863. The next prime is 28347899. The reversal of 28347871 is 17874382.

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

It is a cyclic number.

It is not a de Polignac number, because 28347871 - 2³ = 28347863 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 (28347811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18006 + ... + 19516.

It is an arithmetic number, because the mean of its divisors is an integer number (3608388).

Almost surely, 2^28347871 is an apocalyptic number.

28347871 is a deficient number, since it is larger than the sum of its proper divisors (519233).

28347871 is a wasteful number, since it uses less digits than its factorization.

28347871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1841.

The product of its digits is 75264, while the sum is 40.

The square root of 28347871 is about 5324.2718751018. The cubic root of 28347871 is about 304.9112740215.

The spelling of 28347871 in words is "twenty-eight million, three hundred forty-seven thousand, eight hundred seventy-one".