28381774 has 8 divisors (see below), whose sum is σ = 42611400. Its totient is φ = 14177976.

The previous prime is 28381757. The next prime is 28381811. The reversal of 28381774 is 47718382.

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

It is a congruent number.

It is an unprimeable number.

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, 3424 + ... + 8275.

It is an arithmetic number, because the mean of its divisors is an integer number (5326425).

Almost surely, 2^28381774 is an apocalyptic number.

28381774 is a deficient number, since it is larger than the sum of its proper divisors (14229626).

28381774 is a wasteful number, since it uses less digits than its factorization.

28381774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12914.

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

The square root of 28381774 is about 5327.4547393666. The cubic root of 28381774 is about 305.0327797789.

The spelling of 28381774 in words is "twenty-eight million, three hundred eighty-one thousand, seven hundred seventy-four".