28106783 has 8 divisors (see below), whose sum is σ = 28485408. Its totient is φ = 27730944.

The previous prime is 28106779. The next prime is 28106789. The reversal of 28106783 is 38760182.

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

It is a cyclic number.

It is not a de Polignac number, because 28106783 - 2² = 28106779 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28106789) 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 7 ways as a sum of consecutive naturals, for example, 25910 + ... + 26972.

It is an arithmetic number, because the mean of its divisors is an integer number (3560676).

Almost surely, 2^28106783 is an apocalyptic number.

28106783 is a deficient number, since it is larger than the sum of its proper divisors (378625).

28106783 is a wasteful number, since it uses less digits than its factorization.

28106783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1393.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 28106783 is about 5301.5830654626. The cubic root of 28106783 is about 304.0444266501.

The spelling of 28106783 in words is "twenty-eight million, one hundred six thousand, seven hundred eighty-three".