28172771 has 8 divisors (see below), whose sum is σ = 30942000. Its totient is φ = 25438240.

The previous prime is 28172759. The next prime is 28172803. The reversal of 28172771 is 17727182.

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 28172771 - 2¹⁰ = 28171747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28172731) 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, 6956 + ... + 10233.

It is an arithmetic number, because the mean of its divisors is an integer number (3867750).

Almost surely, 2^28172771 is an apocalyptic number.

28172771 is a deficient number, since it is larger than the sum of its proper divisors (2769229).

28172771 is a wasteful number, since it uses less digits than its factorization.

28172771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17349.

The product of its digits is 10976, while the sum is 35.

The square root of 28172771 is about 5307.8028411010. The cubic root of 28172771 is about 304.2821818663.

The spelling of 28172771 in words is "twenty-eight million, one hundred seventy-two thousand, seven hundred seventy-one".