28668514 has 16 divisors (see below), whose sum is σ = 49462848. Its totient is φ = 12207312.

The previous prime is 28668509. The next prime is 28668517. The reversal of 28668514 is 41586682.

It is not an unprimeable number, because it can be changed into a prime (28668517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4324 + ... + 8719.

It is an arithmetic number, because the mean of its divisors is an integer number (3091428).

Almost surely, 2^28668514 is an apocalyptic number.

28668514 is a deficient number, since it is larger than the sum of its proper divisors (20794334).

28668514 is a wasteful number, since it uses less digits than its factorization.

28668514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13209.

The product of its digits is 92160, while the sum is 40.

The square root of 28668514 is about 5354.2986468818. The cubic root of 28668514 is about 306.0565845777.

The spelling of 28668514 in words is "twenty-eight million, six hundred sixty-eight thousand, five hundred fourteen".