27966989 has 8 divisors (see below), whose sum is σ = 29792448. Its totient is φ = 26161600.

The previous prime is 27966979. The next prime is 27967013. The reversal of 27966989 is 98966972.

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 27966989 - 2⁴ = 27966973 is a prime.

It is a super-2 number, since 2×27966989² = 1564304947452242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27966979) 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, 2087 + ... + 7764.

It is an arithmetic number, because the mean of its divisors is an integer number (3724056).

Almost surely, 2^27966989 is an apocalyptic number.

It is an amenable number.

27966989 is a deficient number, since it is larger than the sum of its proper divisors (1825459).

27966989 is a wasteful number, since it uses less digits than its factorization.

27966989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10035.

The product of its digits is 2939328, while the sum is 56.

The square root of 27966989 is about 5288.3824559122. The cubic root of 27966989 is about 303.5395159282.

The spelling of 27966989 in words is "twenty-seven million, nine hundred sixty-six thousand, nine hundred eighty-nine".