28384378 has 8 divisors (see below), whose sum is σ = 46447200. Its totient is φ = 12901980.

The previous prime is 28384303. The next prime is 28384379. The reversal of 28384378 is 87348382.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (28384379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 645078 + ... + 645121.

It is an arithmetic number, because the mean of its divisors is an integer number (5805900).

Almost surely, 2^28384378 is an apocalyptic number.

28384378 is a deficient number, since it is larger than the sum of its proper divisors (18062822).

28384378 is a wasteful number, since it uses less digits than its factorization.

28384378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1290212.

The product of its digits is 258048, while the sum is 43.

The square root of 28384378 is about 5327.6991281415. The cubic root of 28384378 is about 305.0421083133.

The spelling of 28384378 in words is "twenty-eight million, three hundred eighty-four thousand, three hundred seventy-eight".