27990011 has 8 divisors (see below), whose sum is σ = 33379584. Its totient is φ = 22948200.

The previous prime is 27989999. The next prime is 27990031. The reversal of 27990011 is 11009972.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27990011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27990031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86765 + ... + 87086.

It is an arithmetic number, because the mean of its divisors is an integer number (4172448).

Almost surely, 2^27990011 is an apocalyptic number.

27990011 is a deficient number, since it is larger than the sum of its proper divisors (5389573).

27990011 is a wasteful number, since it uses less digits than its factorization.

27990011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173881.

The product of its (nonzero) digits is 1134, while the sum is 29.

The square root of 27990011 is about 5290.5586661524. The cubic root of 27990011 is about 303.6227827888.

Adding to 27990011 its reverse (11009972), we get a palindrome (38999983).

The spelling of 27990011 in words is "twenty-seven million, nine hundred ninety thousand, eleven".