28661171 has 8 divisors (see below), whose sum is σ = 35733504. Its totient is φ = 22333320.

The previous prime is 28661161. The next prime is 28661179. The reversal of 28661171 is 17116682.

It is a happy number.

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 28661171 - 2⁶ = 28661107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28661179) 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, 186035 + ... + 186188.

It is an arithmetic number, because the mean of its divisors is an integer number (4466688).

Almost surely, 2^28661171 is an apocalyptic number.

28661171 is a deficient number, since it is larger than the sum of its proper divisors (7072333).

28661171 is a wasteful number, since it uses less digits than its factorization.

28661171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372241.

The product of its digits is 4032, while the sum is 32.

The square root of 28661171 is about 5353.6128922439. The cubic root of 28661171 is about 306.0304517803.

It can be divided in two parts, 286611 and 71, that added together give a palindrome (286682).

The spelling of 28661171 in words is "twenty-eight million, six hundred sixty-one thousand, one hundred seventy-one".