28638014 has 4 divisors (see below), whose sum is σ = 42957024. Its totient is φ = 14319006.

The previous prime is 28638007. The next prime is 28638019. The reversal of 28638014 is 41083682.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 41083682 = 2 ⋅20541841.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28638019) by changing a digit.

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, 7159502 + ... + 7159505.

It is an arithmetic number, because the mean of its divisors is an integer number (10739256).

Almost surely, 2^28638014 is an apocalyptic number.

28638014 is a deficient number, since it is larger than the sum of its proper divisors (14319010).

28638014 is a wasteful number, since it uses less digits than its factorization.

28638014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14319009.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 28638014 is about 5351.4497101253. The cubic root of 28638014 is about 305.9480097356.

The spelling of 28638014 in words is "twenty-eight million, six hundred thirty-eight thousand, fourteen".