27989641 has 8 divisors (see below), whose sum is σ = 29768480. Its totient is φ = 26241408.

The previous prime is 27989623. The next prime is 27989651. The reversal of 27989641 is 14698972.

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 27989641 - 2⁵ = 27989609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27989591 and 27989600.

It is not an unprimeable number, because it can be changed into a prime (27989651) 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, 5751 + ... + 9436.

It is an arithmetic number, because the mean of its divisors is an integer number (3721060).

Almost surely, 2^27989641 is an apocalyptic number.

It is an amenable number.

27989641 is a deficient number, since it is larger than the sum of its proper divisors (1778839).

27989641 is a wasteful number, since it uses less digits than its factorization.

27989641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15303.

The product of its digits is 217728, while the sum is 46.

The square root of 27989641 is about 5290.5236980851. The cubic root of 27989641 is about 303.6214449195.

The spelling of 27989641 in words is "twenty-seven million, nine hundred eighty-nine thousand, six hundred forty-one".