28668334 has 4 divisors (see below), whose sum is σ = 43002504. Its totient is φ = 14334166.

The previous prime is 28668331. The next prime is 28668337. The reversal of 28668334 is 43386682.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43386682 = 2 ⋅21693341.

It is an interprime number because it is at equal distance from previous prime (28668331) and next prime (28668337).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28668331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7167082 + ... + 7167085.

It is an arithmetic number, because the mean of its divisors is an integer number (10750626).

Almost surely, 2^28668334 is an apocalyptic number.

28668334 is a deficient number, since it is larger than the sum of its proper divisors (14334170).

28668334 is a wasteful number, since it uses less digits than its factorization.

28668334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14334169.

The product of its digits is 165888, while the sum is 40.

The square root of 28668334 is about 5354.2818379312. The cubic root of 28668334 is about 306.0559440341.

The spelling of 28668334 in words is "twenty-eight million, six hundred sixty-eight thousand, three hundred thirty-four".