28627747 has 4 divisors (see below), whose sum is σ = 29236896. Its totient is φ = 28018600.

The previous prime is 28627741. The next prime is 28627757. The reversal of 28627747 is 74772682.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28627747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28627741) 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 3 ways as a sum of consecutive naturals, for example, 304504 + ... + 304597.

It is an arithmetic number, because the mean of its divisors is an integer number (7309224).

Almost surely, 2^28627747 is an apocalyptic number.

28627747 is a deficient number, since it is larger than the sum of its proper divisors (609149).

28627747 is an equidigital number, since it uses as much as digits as its factorization.

28627747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609148.

The product of its digits is 263424, while the sum is 43.

The square root of 28627747 is about 5350.4903513603. The cubic root of 28627747 is about 305.9114436097.

It can be divided in two parts, 2862 and 7747, that added together give a square (10609 = 103²).

The spelling of 28627747 in words is "twenty-eight million, six hundred twenty-seven thousand, seven hundred forty-seven".