28639214 has 8 divisors (see below), whose sum is σ = 43547520. Its totient is φ = 14123376.

The previous prime is 28639207. The next prime is 28639223. The reversal of 28639214 is 41293682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97934 + ... + 98225.

It is an arithmetic number, because the mean of its divisors is an integer number (5443440).

Almost surely, 2^28639214 is an apocalyptic number.

28639214 is a deficient number, since it is larger than the sum of its proper divisors (14908306).

28639214 is a wasteful number, since it uses less digits than its factorization.

28639214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196234.

The product of its digits is 20736, while the sum is 35.

The square root of 28639214 is about 5351.5618281021. The cubic root of 28639214 is about 305.9522829891.

The spelling of 28639214 in words is "twenty-eight million, six hundred thirty-nine thousand, two hundred fourteen".