27918993 has 8 divisors (see below), whose sum is σ = 37388800. Its totient is φ = 18530928.

The previous prime is 27918983. The next prime is 27919007. The reversal of 27918993 is 39981972.

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

It is not a de Polignac number, because 27918993 - 2⁶ = 27918929 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (27918973) 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, 19633 + ... + 21006.

It is an arithmetic number, because the mean of its divisors is an integer number (4673600).

Almost surely, 2^27918993 is an apocalyptic number.

It is an amenable number.

27918993 is a deficient number, since it is larger than the sum of its proper divisors (9469807).

27918993 is a wasteful number, since it uses less digits than its factorization.

27918993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40871.

The product of its digits is 244944, while the sum is 48.

The square root of 27918993 is about 5283.8426358097. The cubic root of 27918993 is about 303.3657750862.

The spelling of 27918993 in words is "twenty-seven million, nine hundred eighteen thousand, nine hundred ninety-three".