28191214 has 16 divisors (see below), whose sum is σ = 43868160. Its totient is φ = 13573080.

The previous prime is 28191209. The next prime is 28191227. The reversal of 28191214 is 41219182.

It is a congruent 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, 12807 + ... + 14845.

It is an arithmetic number, because the mean of its divisors is an integer number (2741760).

Almost surely, 2^28191214 is an apocalyptic number.

28191214 is a deficient number, since it is larger than the sum of its proper divisors (15676946).

28191214 is a wasteful number, since it uses less digits than its factorization.

28191214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2295.

The product of its digits is 1152, while the sum is 28.

The square root of 28191214 is about 5309.5399047375. The cubic root of 28191214 is about 304.3485657296.

It can be divided in two parts, 2819121 and 4, that added together give a triangular number (2819125 = T₂₃₇₄).

The spelling of 28191214 in words is "twenty-eight million, one hundred ninety-one thousand, two hundred fourteen".