28068747 has 16 divisors (see below), whose sum is σ = 43580160. Its totient is φ = 15736032.

The previous prime is 28068739. The next prime is 28068791. The reversal of 28068747 is 74786082.

It is not a de Polignac number, because 28068747 - 2³ = 28068739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28068699 and 28068708.

It is not an unprimeable number, because it can be changed into a prime (28068707) 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 15 ways as a sum of consecutive naturals, for example, 11497 + ... + 13722.

It is an arithmetic number, because the mean of its divisors is an integer number (2723760).

Almost surely, 2^28068747 is an apocalyptic number.

28068747 is a deficient number, since it is larger than the sum of its proper divisors (15511413).

28068747 is a wasteful number, since it uses less digits than its factorization.

28068747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25282.

The product of its (nonzero) digits is 150528, while the sum is 42.

The square root of 28068747 is about 5297.9946206088. The cubic root of 28068747 is about 303.9072135745.

The spelling of 28068747 in words is "twenty-eight million, sixty-eight thousand, seven hundred forty-seven".