27981296 has 20 divisors (see below), whose sum is σ = 61958832. Its totient is φ = 11991936.

The previous prime is 27981293. The next prime is 27981301. The reversal of 27981296 is 69218972.

It is a happy number.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27981293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124805 + ... + 125028.

Almost surely, 2^27981296 is an apocalyptic number.

It is an amenable number.

27981296 is an abundant number, since it is smaller than the sum of its proper divisors (33977536).

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

27981296 is a wasteful number, since it uses less digits than its factorization.

27981296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249848 (or 249842 counting only the distinct ones).

The product of its digits is 108864, while the sum is 44.

The square root of 27981296 is about 5289.7349650053. The cubic root of 27981296 is about 303.5912674120.

The spelling of 27981296 in words is "twenty-seven million, nine hundred eighty-one thousand, two hundred ninety-six".