28384237 has 16 divisors (see below), whose sum is σ = 34715520. Its totient is φ = 22652928.

The previous prime is 28384229. The next prime is 28384247. The reversal of 28384237 is 73248382.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28384237 - 2³ = 28384229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28384196 and 28384205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28384247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10314 + ... + 12772.

It is an arithmetic number, because the mean of its divisors is an integer number (2169720).

Almost surely, 2^28384237 is an apocalyptic number.

It is an amenable number.

28384237 is a deficient number, since it is larger than the sum of its proper divisors (6331283).

28384237 is a wasteful number, since it uses less digits than its factorization.

28384237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2580.

The product of its digits is 64512, while the sum is 37.

The square root of 28384237 is about 5327.6858953959. The cubic root of 28384237 is about 305.0416032114.

The spelling of 28384237 in words is "twenty-eight million, three hundred eighty-four thousand, two hundred thirty-seven".