27944021 has 8 divisors (see below), whose sum is σ = 31968000. Its totient is φ = 23928048.

The previous prime is 27944017. The next prime is 27944071. The reversal of 27944021 is 12044972.

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 27944021 - 2² = 27944017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27944071) 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, 12980 + ... + 14978.

It is an arithmetic number, because the mean of its divisors is an integer number (3996000).

Almost surely, 2^27944021 is an apocalyptic number.

It is an amenable number.

27944021 is a deficient number, since it is larger than the sum of its proper divisors (4023979).

27944021 is a wasteful number, since it uses less digits than its factorization.

27944021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4003.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 27944021 is about 5286.2104574071. The cubic root of 27944021 is about 303.4563988292.

Adding to 27944021 its reverse (12044972), we get a palindrome (39988993).

The spelling of 27944021 in words is "twenty-seven million, nine hundred forty-four thousand, twenty-one".