28171473 has 16 divisors (see below), whose sum is σ = 41121216. Its totient is φ = 17013440.

The previous prime is 28171463. The next prime is 28171483. The reversal of 28171473 is 37417182.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28171463) and next prime (28171483).

It is a cyclic number.

It is not a de Polignac number, because 28171473 - 2⁸ = 28171217 is a prime.

It is a super-3 number, since 3×28171473³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (28171463) 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, 9115 + ... + 11807.

It is an arithmetic number, because the mean of its divisors is an integer number (2570076).

Almost surely, 2^28171473 is an apocalyptic number.

It is an amenable number.

28171473 is a deficient number, since it is larger than the sum of its proper divisors (12949743).

28171473 is a wasteful number, since it uses less digits than its factorization.

28171473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3024.

The product of its digits is 9408, while the sum is 33.

The square root of 28171473 is about 5307.6805668766. The cubic root of 28171473 is about 304.2775087449.

The spelling of 28171473 in words is "twenty-eight million, one hundred seventy-one thousand, four hundred seventy-three".