28274783 has 4 divisors (see below), whose sum is σ = 28396368. Its totient is φ = 28153200.

The previous prime is 28274773. The next prime is 28274801. The reversal of 28274783 is 38747282.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28274783 - 2⁴ = 28274767 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28274783.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28274713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60443 + ... + 60908.

It is an arithmetic number, because the mean of its divisors is an integer number (7099092).

Almost surely, 2^28274783 is an apocalyptic number.

28274783 is a deficient number, since it is larger than the sum of its proper divisors (121585).

28274783 is a wasteful number, since it uses less digits than its factorization.

28274783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121584.

The product of its digits is 150528, while the sum is 41.

The square root of 28274783 is about 5317.4037838028. The cubic root of 28274783 is about 304.6490022962.

The spelling of 28274783 in words is "twenty-eight million, two hundred seventy-four thousand, seven hundred eighty-three".