27801011 has 8 divisors (see below), whose sum is σ = 31901184. Its totient is φ = 23733000.

The previous prime is 27800989. The next prime is 27801029. The reversal of 27801011 is 11010872.

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-27801011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27801031) 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, 6155 + ... + 9668.

It is an arithmetic number, because the mean of its divisors is an integer number (3987648).

Almost surely, 2^27801011 is an apocalyptic number.

27801011 is a deficient number, since it is larger than the sum of its proper divisors (4100173).

27801011 is a wasteful number, since it uses less digits than its factorization.

27801011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16081.

The product of its (nonzero) digits is 112, while the sum is 20.

The square root of 27801011 is about 5272.6664032537. Note that the first 3 decimals coincide. The cubic root of 27801011 is about 302.9378437423.

Adding to 27801011 its reverse (11010872), we get a palindrome (38811883).

The spelling of 27801011 in words is "twenty-seven million, eight hundred one thousand, eleven".