28319384 has 16 divisors (see below), whose sum is σ = 54101520. Its totient is φ = 13892320.

The previous prime is 28319381. The next prime is 28319419. The reversal of 28319384 is 48391382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28319381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32972 + ... + 33819.

It is an arithmetic number, because the mean of its divisors is an integer number (3381345).

Almost surely, 2^28319384 is an apocalyptic number.

It is an amenable number.

28319384 is a deficient number, since it is larger than the sum of its proper divisors (25782136).

28319384 is a wasteful number, since it uses less digits than its factorization.

28319384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66850 (or 66846 counting only the distinct ones).

The product of its digits is 41472, while the sum is 38.

The square root of 28319384 is about 5321.5960012011. The cubic root of 28319384 is about 304.8091038722.

The spelling of 28319384 in words is "twenty-eight million, three hundred nineteen thousand, three hundred eighty-four".