27741981 has 8 divisors (see below), whose sum is σ = 37013760. Its totient is φ = 18482432.

The previous prime is 27741941. The next prime is 27741983. The reversal of 27741981 is 18914772.

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 27741981 - 2¹³ = 27733789 is a prime.

It is a super-4 number, since 4×27741981⁴ (a number of 31 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27741983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6580 + ... + 9938.

It is an arithmetic number, because the mean of its divisors is an integer number (4626720).

Almost surely, 2^27741981 is an apocalyptic number.

It is an amenable number.

27741981 is a deficient number, since it is larger than the sum of its proper divisors (9271779).

27741981 is a wasteful number, since it uses less digits than its factorization.

27741981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6115.

The product of its digits is 28224, while the sum is 39.

The square root of 27741981 is about 5267.0656916351. The cubic root of 27741981 is about 302.7232820911.

The spelling of 27741981 in words is "twenty-seven million, seven hundred forty-one thousand, nine hundred eighty-one".