28811814 has 8 divisors (see below), whose sum is σ = 57623640. Its totient is φ = 9603936.

The previous prime is 28811779. The next prime is 28811831. The reversal of 28811814 is 41811882.

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

28811814 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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, 2400979 + ... + 2400990.

It is an arithmetic number, because the mean of its divisors is an integer number (7202955).

Almost surely, 2^28811814 is an apocalyptic number.

28811814 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28811814 is a wasteful number, since it uses less digits than its factorization.

28811814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4801974.

The product of its digits is 4096, while the sum is 33.

The square root of 28811814 is about 5367.6637376050. The cubic root of 28811814 is about 306.5656800964.

The spelling of 28811814 in words is "twenty-eight million, eight hundred eleven thousand, eight hundred fourteen".