27993612 has 48 divisors (see below), whose sum is σ = 69955200. Its totient is φ = 8686080.

The previous prime is 27993601. The next prime is 27993619. The reversal of 27993612 is 21639972.

It is not an unprimeable number, because it can be changed into a prime (27993619) 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 15 ways as a sum of consecutive naturals, for example, 12412 + ... + 14492.

It is an arithmetic number, because the mean of its divisors is an integer number (1457400).

Almost surely, 2^27993612 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27993612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34977600).

27993612 is an abundant number, since it is smaller than the sum of its proper divisors (41961588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27993612 is a wasteful number, since it uses less digits than its factorization.

27993612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2166 (or 2164 counting only the distinct ones).

The product of its digits is 40824, while the sum is 39.

The square root of 27993612 is about 5290.8989784346. The cubic root of 27993612 is about 303.6358028951.

The spelling of 27993612 in words is "twenty-seven million, nine hundred ninety-three thousand, six hundred twelve".