28785983 has 2 divisors, whose sum is σ = 28785984. Its totient is φ = 28785982.

The previous prime is 28785979. The next prime is 28786001. The reversal of 28785983 is 38958782.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28785983 - 2² = 28785979 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28785083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14392991 + 14392992.

It is an arithmetic number, because the mean of its divisors is an integer number (14392992).

Almost surely, 2^28785983 is an apocalyptic number.

28785983 is a deficient number, since it is larger than the sum of its proper divisors (1).

28785983 is an equidigital number, since it uses as much as digits as its factorization.

28785983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680, while the sum is 50.

The square root of 28785983 is about 5365.2570301897. The cubic root of 28785983 is about 306.4740363723.

The spelling of 28785983 in words is "twenty-eight million, seven hundred eighty-five thousand, nine hundred eighty-three".