28744927 has 4 divisors (see below), whose sum is σ = 28895616. Its totient is φ = 28594240.

The previous prime is 28744889. The next prime is 28744939. The reversal of 28744927 is 72944782.

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

It is a cyclic number.

It is not a de Polignac number, because 28744927 - 2¹⁹ = 28220639 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 (28744957) 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, 75058 + ... + 75439.

It is an arithmetic number, because the mean of its divisors is an integer number (7223904).

Almost surely, 2^28744927 is an apocalyptic number.

28744927 is a deficient number, since it is larger than the sum of its proper divisors (150689).

28744927 is a wasteful number, since it uses less digits than its factorization.

28744927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150688.

The product of its digits is 225792, while the sum is 43.

The square root of 28744927 is about 5361.4295668226. The cubic root of 28744927 is about 306.3282642123.

The spelling of 28744927 in words is "twenty-eight million, seven hundred forty-four thousand, nine hundred twenty-seven".