27287993 has 8 divisors (see below), whose sum is σ = 27799968. Its totient is φ = 26780544.

The previous prime is 27287989. The next prime is 27288007. The reversal of 27287993 is 39978272.

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 27287993 - 2² = 27287989 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27287963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12521 + ... + 14537.

It is an arithmetic number, because the mean of its divisors is an integer number (3474996).

Almost surely, 2^27287993 is an apocalyptic number.

It is an amenable number.

27287993 is a deficient number, since it is larger than the sum of its proper divisors (511975).

27287993 is a wasteful number, since it uses less digits than its factorization.

27287993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2263.

The product of its digits is 381024, while the sum is 47.

The square root of 27287993 is about 5223.7910563115. The cubic root of 27287993 is about 301.0628706469.

The spelling of 27287993 in words is "twenty-seven million, two hundred eighty-seven thousand, nine hundred ninety-three".