28396171 has 16 divisors (see below), whose sum is σ = 30935520. Its totient is φ = 25966080.

The previous prime is 28396163. The next prime is 28396177. The reversal of 28396171 is 17169382.

It is a cyclic number.

It is not a de Polignac number, because 28396171 - 2³ = 28396163 is a prime.

It is a super-2 number, since 2×28396171² = 1612685054922482, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28396171.

It is not an unprimeable number, because it can be changed into a prime (28396177) 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, 144045 + ... + 144241.

It is an arithmetic number, because the mean of its divisors is an integer number (1933470).

Almost surely, 2^28396171 is an apocalyptic number.

28396171 is a deficient number, since it is larger than the sum of its proper divisors (2539349).

28396171 is a wasteful number, since it uses less digits than its factorization.

28396171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414.

The product of its digits is 18144, while the sum is 37.

The square root of 28396171 is about 5328.8057761566. The cubic root of 28396171 is about 305.0843482559.

The spelling of 28396171 in words is "twenty-eight million, three hundred ninety-six thousand, one hundred seventy-one".