27078681 has 16 divisors (see below), whose sum is σ = 41385344. Its totient is φ = 15427584.

The previous prime is 27078677. The next prime is 27078697. The reversal of 27078681 is 18687072.

It is not a de Polignac number, because 27078681 - 2² = 27078677 is a prime.

It is a super-2 number, since 2×27078681² = 1466509929399522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27078641) 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, 6105 + ... + 9561.

It is an arithmetic number, because the mean of its divisors is an integer number (2586584).

Almost surely, 2^27078681 is an apocalyptic number.

27078681 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

27078681 is a deficient number, since it is larger than the sum of its proper divisors (14306663).

27078681 is a wasteful number, since it uses less digits than its factorization.

27078681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3840.

The product of its (nonzero) digits is 37632, while the sum is 39.

The square root of 27078681 is about 5203.7179977397. The cubic root of 27078681 is about 300.2911285004.

The spelling of 27078681 in words is "twenty-seven million, seventy-eight thousand, six hundred eighty-one".