27929661 has 8 divisors (see below), whose sum is σ = 38105760. Its totient is φ = 18186672.

The previous prime is 27929653. The next prime is 27929663. The reversal of 27929661 is 16692972.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 27929661 - 2³ = 27929653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27929663) 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, 108126 + ... + 108383.

It is an arithmetic number, because the mean of its divisors is an integer number (4763220).

Almost surely, 2^27929661 is an apocalyptic number.

It is an amenable number.

27929661 is a deficient number, since it is larger than the sum of its proper divisors (10176099).

27929661 is a wasteful number, since it uses less digits than its factorization.

27929661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216555.

The product of its digits is 81648, while the sum is 42.

The square root of 27929661 is about 5284.8520319873. The cubic root of 27929661 is about 303.4044094067.

The spelling of 27929661 in words is "twenty-seven million, nine hundred twenty-nine thousand, six hundred sixty-one".