28229871 has 8 divisors (see below), whose sum is σ = 38854144. Its totient is φ = 18212760.

The previous prime is 28229857. The next prime is 28229879. The reversal of 28229871 is 17892282.

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

It is not a de Polignac number, because 28229871 - 2⁷ = 28229743 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 (28229879) 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, 151681 + ... + 151866.

It is an arithmetic number, because the mean of its divisors is an integer number (4856768).

Almost surely, 2^28229871 is an apocalyptic number.

28229871 is a deficient number, since it is larger than the sum of its proper divisors (10624273).

28229871 is a wasteful number, since it uses less digits than its factorization.

28229871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303581.

The product of its digits is 32256, while the sum is 39.

The square root of 28229871 is about 5313.1789919031. The cubic root of 28229871 is about 304.4876141219.

The spelling of 28229871 in words is "twenty-eight million, two hundred twenty-nine thousand, eight hundred seventy-one".