27981096 has 128 divisors (see below), whose sum is σ = 85155840. Its totient is φ = 7545600.

The previous prime is 27981077. The next prime is 27981097. The reversal of 27981096 is 69018972.

It is a super-2 number, since 2×27981096² = 1565883466722432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27981097) 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 31 ways as a sum of consecutive naturals, for example, 106261 + ... + 106523.

It is an arithmetic number, because the mean of its divisors is an integer number (665280).

Almost surely, 2^27981096 is an apocalyptic number.

27981096 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27981096, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42577920).

27981096 is an abundant number, since it is smaller than the sum of its proper divisors (57174744).

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

27981096 is a wasteful number, since it uses less digits than its factorization.

27981096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327 (or 323 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 27981096 is about 5289.7160604327. The cubic root of 27981096 is about 303.5905440907.

The spelling of 27981096 in words is "twenty-seven million, nine hundred eighty-one thousand, ninety-six".