28309814 has 8 divisors (see below), whose sum is σ = 45731280. Its totient is φ = 13066056.

The previous prime is 28309783. The next prime is 28309823. The reversal of 28309814 is 41890382.

It is a happy number.

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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 544394 + ... + 544445.

It is an arithmetic number, because the mean of its divisors is an integer number (5716410).

Almost surely, 2^28309814 is an apocalyptic number.

28309814 is a deficient number, since it is larger than the sum of its proper divisors (17421466).

28309814 is a wasteful number, since it uses less digits than its factorization.

28309814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1088854.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 28309814 is about 5320.6967588841. The cubic root of 28309814 is about 304.7747651807.

The spelling of 28309814 in words is "twenty-eight million, three hundred nine thousand, eight hundred fourteen".