27984749 has 8 divisors (see below), whose sum is σ = 30266880. Its totient is φ = 25721136.

The previous prime is 27984727. The next prime is 27984751. The reversal of 27984749 is 94748972.

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 27984749 - 2¹² = 27980653 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 27984697 and 27984706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27984799) 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, 1397 + ... + 7610.

It is an arithmetic number, because the mean of its divisors is an integer number (3783360).

Almost surely, 2^27984749 is an apocalyptic number.

It is an amenable number.

27984749 is a deficient number, since it is larger than the sum of its proper divisors (2282131).

27984749 is a wasteful number, since it uses less digits than its factorization.

27984749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9259.

The product of its digits is 1016064, while the sum is 50.

The square root of 27984749 is about 5290.0613417994. The cubic root of 27984749 is about 303.6037550100.

The spelling of 27984749 in words is "twenty-seven million, nine hundred eighty-four thousand, seven hundred forty-nine".