28318774 has 8 divisors (see below), whose sum is σ = 46339848. Its totient is φ = 12872160.

The previous prime is 28318757. The next prime is 28318777. The reversal of 28318774 is 47781382.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28318777) 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, 643587 + ... + 643630.

It is an arithmetic number, because the mean of its divisors is an integer number (5792481).

Almost surely, 2^28318774 is an apocalyptic number.

28318774 is a deficient number, since it is larger than the sum of its proper divisors (18021074).

28318774 is a wasteful number, since it uses less digits than its factorization.

28318774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1287230.

The product of its digits is 75264, while the sum is 40.

The square root of 28318774 is about 5321.5386872595. The cubic root of 28318774 is about 304.8069153255.

It can be divided in two parts, 28318 and 774, that added together give a palindrome (29092).

The spelling of 28318774 in words is "twenty-eight million, three hundred eighteen thousand, seven hundred seventy-four".