28712727 has 12 divisors (see below), whose sum is σ = 42812224. Its totient is φ = 18524160.

The previous prime is 28712713. The next prime is 28712753. The reversal of 28712727 is 72721782.

It is not a de Polignac number, because 28712727 - 2¹⁶ = 28647191 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28712691 and 28712700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28712227) 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, 51178 + ... + 51735.

Almost surely, 2^28712727 is an apocalyptic number.

28712727 is a deficient number, since it is larger than the sum of its proper divisors (14099497).

28712727 is a wasteful number, since it uses less digits than its factorization.

28712727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102950 (or 102947 counting only the distinct ones).

The product of its digits is 21952, while the sum is 36.

The square root of 28712727 is about 5358.4257949513. The cubic root of 28712727 is about 306.2138387402.

The spelling of 28712727 in words is "twenty-eight million, seven hundred twelve thousand, seven hundred twenty-seven".