28114778 has 8 divisors (see below), whose sum is σ = 42863700. Its totient is φ = 13826880.

The previous prime is 28114747. The next prime is 28114811. The reversal of 28114778 is 87741182.

It can be written as a sum of positive squares in 2 ways, for example, as 27952369 + 162409 = 5287^2 + 403^2 .

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

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, 115103 + ... + 115346.

Almost surely, 2^28114778 is an apocalyptic number.

28114778 is a deficient number, since it is larger than the sum of its proper divisors (14748922).

28114778 is a wasteful number, since it uses less digits than its factorization.

28114778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230512.

The product of its digits is 25088, while the sum is 38.

The square root of 28114778 is about 5302.3370319134. The cubic root of 28114778 is about 304.0732524883.

The spelling of 28114778 in words is "twenty-eight million, one hundred fourteen thousand, seven hundred seventy-eight".