28393814 has 4 divisors (see below), whose sum is σ = 42590724. Its totient is φ = 14196906.

The previous prime is 28393801. The next prime is 28393829. The reversal of 28393814 is 41839382.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7098452 + ... + 7098455.

It is an arithmetic number, because the mean of its divisors is an integer number (10647681).

Almost surely, 2^28393814 is an apocalyptic number.

28393814 is a deficient number, since it is larger than the sum of its proper divisors (14196910).

28393814 is a wasteful number, since it uses less digits than its factorization.

28393814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14196909.

The product of its digits is 41472, while the sum is 38.

The square root of 28393814 is about 5328.5846150737. The cubic root of 28393814 is about 305.0759069335.

The spelling of 28393814 in words is "twenty-eight million, three hundred ninety-three thousand, eight hundred fourteen".