28171008 has 54 divisors (see below), whose sum is σ = 81230604. Its totient is φ = 9389568.

The previous prime is 28171007. The next prime is 28171009. The reversal of 28171008 is 80017182.

It is an interprime number because it is at equal distance from previous prime (28171007) and next prime (28171009).

It is not an unprimeable number, because it can be changed into a prime (28171007) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3810 + ... + 8417.

Almost surely, 2^28171008 is an apocalyptic number.

It is an amenable number.

28171008 is an abundant number, since it is smaller than the sum of its proper divisors (53059596).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28171008 is a wasteful number, since it uses less digits than its factorization.

28171008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12249 (or 12232 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 28171008 is about 5307.6367622512. The cubic root of 28171008 is about 304.2758345948.

It can be divided in two parts, 281 and 71008, that added together give a square (71289 = 267²).

The spelling of 28171008 in words is "twenty-eight million, one hundred seventy-one thousand, eight".