28861214 has 8 divisors (see below), whose sum is σ = 43423608. Its totient is φ = 14386680.

The previous prime is 28861211. The next prime is 28861219. The reversal of 28861214 is 41216882.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28861211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21137 + ... + 22460.

It is an arithmetic number, because the mean of its divisors is an integer number (5427951).

Almost surely, 2^28861214 is an apocalyptic number.

28861214 is a deficient number, since it is larger than the sum of its proper divisors (14562394).

28861214 is a wasteful number, since it uses less digits than its factorization.

28861214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43930.

The product of its digits is 6144, while the sum is 32.

The square root of 28861214 is about 5372.2633963721. The cubic root of 28861214 is about 306.7407899485.

The spelling of 28861214 in words is "twenty-eight million, eight hundred sixty-one thousand, two hundred fourteen".