28618727 has 4 divisors (see below), whose sum is σ = 28664016. Its totient is φ = 28573440.

The previous prime is 28618721. The next prime is 28618729. The reversal of 28618727 is 72781682.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72781682 = 2 ⋅36390841.

It is a cyclic number.

It is not a de Polignac number, because 28618727 - 2⁶ = 28618663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28618721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21683 + ... + 22964.

It is an arithmetic number, because the mean of its divisors is an integer number (7166004).

Almost surely, 2^28618727 is an apocalyptic number.

28618727 is a deficient number, since it is larger than the sum of its proper divisors (45289).

28618727 is an equidigital number, since it uses as much as digits as its factorization.

28618727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45288.

The product of its digits is 75264, while the sum is 41.

The square root of 28618727 is about 5349.6473715564. The cubic root of 28618727 is about 305.8793114843.

The spelling of 28618727 in words is "twenty-eight million, six hundred eighteen thousand, seven hundred twenty-seven".