27989419 has 4 divisors (see below), whose sum is σ = 28009800. Its totient is φ = 27969040.

The previous prime is 27989417. The next prime is 27989449. The reversal of 27989419 is 91498972.

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 27989419 - 2¹ = 27989417 is a prime.

It is a super-2 number, since 2×27989419² = 1566815151915122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27989417) 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, 7969 + ... + 10930.

It is an arithmetic number, because the mean of its divisors is an integer number (7002450).

Almost surely, 2^27989419 is an apocalyptic number.

27989419 is a deficient number, since it is larger than the sum of its proper divisors (20381).

27989419 is a wasteful number, since it uses less digits than its factorization.

27989419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20380.

The product of its digits is 326592, while the sum is 49.

The square root of 27989419 is about 5290.5027171338. The cubic root of 27989419 is about 303.6206421923.

It can be divided in two parts, 279 and 89419, that added together give a palindrome (89698).

The spelling of 27989419 in words is "twenty-seven million, nine hundred eighty-nine thousand, four hundred nineteen".