28668123 has 12 divisors (see below), whose sum is σ = 45174168. Its totient is φ = 17374560.

The previous prime is 28668113. The next prime is 28668151. The reversal of 28668123 is 32186682.

It is not a de Polignac number, because 28668123 - 2²² = 24473819 is a prime.

It is a super-2 number, since 2×28668123² = 1643722552686258, which contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 144690 + ... + 144887.

It is an arithmetic number, because the mean of its divisors is an integer number (3764514).

Almost surely, 2^28668123 is an apocalyptic number.

28668123 is a deficient number, since it is larger than the sum of its proper divisors (16506045).

28668123 is a wasteful number, since it uses less digits than its factorization.

28668123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289594 (or 289591 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 28668123 is about 5354.2621340386. The cubic root of 28668123 is about 306.0551931712.

It can be divided in two parts, 2866812 and 3, that added together give a triangular number (2866815 = T₂₃₉₄).

The spelling of 28668123 in words is "twenty-eight million, six hundred sixty-eight thousand, one hundred twenty-three".