28171412 has 24 divisors (see below), whose sum is σ = 53222400. Its totient is φ = 13007456.

The previous prime is 28171411. The next prime is 28171421. The reversal of 28171412 is 21417182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28171411) 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, 2612 + ... + 7947.

It is an arithmetic number, because the mean of its divisors is an integer number (2217600).

Almost surely, 2^28171412 is an apocalyptic number.

It is an amenable number.

28171412 is a deficient number, since it is larger than the sum of its proper divisors (25050988).

28171412 is a wasteful number, since it uses less digits than its factorization.

28171412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10615 (or 10613 counting only the distinct ones).

The product of its digits is 896, while the sum is 26.

The square root of 28171412 is about 5307.6748204840. The cubic root of 28171412 is about 304.2772891263.

Adding to 28171412 its reverse (21417182), we get a palindrome (49588594).

The spelling of 28171412 in words is "twenty-eight million, one hundred seventy-one thousand, four hundred twelve".