28811914 has 8 divisors (see below), whose sum is σ = 43251300. Its totient is φ = 14394816.

The previous prime is 28811911. The next prime is 28811917. The reversal of 28811914 is 41911882.

It is an interprime number because it is at equal distance from previous prime (28811911) and next prime (28811917).

It can be written as a sum of positive squares in 2 ways, for example, as 28804689 + 7225 = 5367^2 + 85^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 28811914.

It is not an unprimeable number, because it can be changed into a prime (28811911) 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, 1839 + ... + 7810.

Almost surely, 2^28811914 is an apocalyptic number.

28811914 is a deficient number, since it is larger than the sum of its proper divisors (14439386).

28811914 is a wasteful number, since it uses less digits than its factorization.

28811914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11144.

The product of its digits is 4608, while the sum is 34.

The square root of 28811914 is about 5367.6730526365. The cubic root of 28811914 is about 306.5660347719.

The spelling of 28811914 in words is "twenty-eight million, eight hundred eleven thousand, nine hundred fourteen".