27800681 has 8 divisors (see below), whose sum is σ = 28139520. Its totient is φ = 27463968.

The previous prime is 27800677. The next prime is 27800683. The reversal of 27800681 is 18600872.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27800681 - 2² = 27800677 is a prime.

It is a super-2 number, since 2×27800681² = 1545755728127522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (27800683) 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 7 ways as a sum of consecutive naturals, for example, 57800 + ... + 58278.

It is an arithmetic number, because the mean of its divisors is an integer number (3517440).

Almost surely, 2^27800681 is an apocalyptic number.

It is an amenable number.

27800681 is a deficient number, since it is larger than the sum of its proper divisors (338839).

27800681 is a wasteful number, since it uses less digits than its factorization.

27800681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 27800681 is about 5272.6351096961. The cubic root of 27800681 is about 302.9366451062.

The spelling of 27800681 in words is "twenty-seven million, eight hundred thousand, six hundred eighty-one".