28257214 has 4 divisors (see below), whose sum is σ = 42385824. Its totient is φ = 14128606.

The previous prime is 28257197. The next prime is 28257221. The reversal of 28257214 is 41275282.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7064302 + ... + 7064305.

It is an arithmetic number, because the mean of its divisors is an integer number (10596456).

Almost surely, 2^28257214 is an apocalyptic number.

28257214 is a deficient number, since it is larger than the sum of its proper divisors (14128610).

28257214 is a wasteful number, since it uses less digits than its factorization.

28257214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14128609.

The product of its digits is 8960, while the sum is 31.

The square root of 28257214 is about 5315.7514990827. The cubic root of 28257214 is about 304.5858896715.

The spelling of 28257214 in words is "twenty-eight million, two hundred fifty-seven thousand, two hundred fourteen".