28728083 has 2 divisors, whose sum is σ = 28728084. Its totient is φ = 28728082.

The previous prime is 28728071. The next prime is 28728097. The reversal of 28728083 is 38082782.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28728083 is a prime.

It is not a weakly prime, because it can be changed into another prime (28728013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14364041 + 14364042.

It is an arithmetic number, because the mean of its divisors is an integer number (14364042).

Almost surely, 2^28728083 is an apocalyptic number.

28728083 is a deficient number, since it is larger than the sum of its proper divisors (1).

28728083 is an equidigital number, since it uses as much as digits as its factorization.

28728083 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 28728083 is about 5359.8584869379. The cubic root of 28728083 is about 306.2684182731.

The spelling of 28728083 in words is "twenty-eight million, seven hundred twenty-eight thousand, eighty-three".