28668119 has 4 divisors (see below), whose sum is σ = 28681320. Its totient is φ = 28654920.

The previous prime is 28668113. The next prime is 28668151. The reversal of 28668119 is 91186682.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91186682 = 2 ⋅45593341.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28668119 is a prime.

It is a super-2 number, since 2×28668119² = 1643722093996322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28668113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2489 + ... + 7970.

It is an arithmetic number, because the mean of its divisors is an integer number (7170330).

Almost surely, 2^28668119 is an apocalyptic number.

28668119 is a deficient number, since it is larger than the sum of its proper divisors (13201).

28668119 is a wasteful number, since it uses less digits than its factorization.

28668119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13200.

The product of its digits is 41472, while the sum is 41.

The square root of 28668119 is about 5354.2617605044. The cubic root of 28668119 is about 306.0551789368.

The spelling of 28668119 in words is "twenty-eight million, six hundred sixty-eight thousand, one hundred nineteen".