28171914 has 16 divisors (see below), whose sum is σ = 56490528. Its totient is φ = 9366192.

The previous prime is 28171909. The next prime is 28171921. The reversal of 28171914 is 41917182.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3532 + ... + 8295.

It is an arithmetic number, because the mean of its divisors is an integer number (3530658).

Almost surely, 2^28171914 is an apocalyptic number.

28171914 is an abundant number, since it is smaller than the sum of its proper divisors (28318614).

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

28171914 is a wasteful number, since it uses less digits than its factorization.

28171914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12229.

The product of its digits is 4032, while the sum is 33.

The square root of 28171914 is about 5307.7221102842. The cubic root of 28171914 is about 304.2790964702.

The spelling of 28171914 in words is "twenty-eight million, one hundred seventy-one thousand, nine hundred fourteen".