28611171 has 16 divisors (see below), whose sum is σ = 43755520. Its totient is φ = 18458280.

The previous prime is 28611137. The next prime is 28611173. The reversal of 28611171 is 17111682.

It is not a de Polignac number, because 28611171 - 2¹¹ = 28609123 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28611173) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16255 + ... + 17928.

It is an arithmetic number, because the mean of its divisors is an integer number (2734720).

Almost surely, 2^28611171 is an apocalyptic number.

28611171 is a deficient number, since it is larger than the sum of its proper divisors (15144349).

28611171 is a wasteful number, since it uses less digits than its factorization.

28611171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34223 (or 34217 counting only the distinct ones).

The product of its digits is 672, while the sum is 27.

The square root of 28611171 is about 5348.9411101638. The cubic root of 28611171 is about 305.8523893980.

It can be divided in two parts, 28611 and 171, that added together give a palindrome (28782).

The spelling of 28611171 in words is "twenty-eight million, six hundred eleven thousand, one hundred seventy-one".