27057681 has 12 divisors (see below), whose sum is σ = 44666752. Its totient is φ = 15461496.

The previous prime is 27057677. The next prime is 27057689. The reversal of 27057681 is 18675072.

27057681 is a `hidden beast` number, since 2 + 7 + 0 + 576 + 81 = 666.

It is not a de Polignac number, because 27057681 - 2² = 27057677 is a prime.

It is a super-2 number, since 2×27057681² = 1464236202195522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27057689) 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 11 ways as a sum of consecutive naturals, for example, 214681 + ... + 214806.

Almost surely, 2^27057681 is an apocalyptic number.

27057681 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

27057681 is a deficient number, since it is larger than the sum of its proper divisors (17609071).

27057681 is a wasteful number, since it uses less digits than its factorization.

27057681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429500 (or 429497 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 27057681 is about 5201.6998183286. The cubic root of 27057681 is about 300.2134813830.

The spelling of 27057681 in words is "twenty-seven million, fifty-seven thousand, six hundred eighty-one".