27676981 has 8 divisors (see below), whose sum is σ = 29355264. Its totient is φ = 26038320.

The previous prime is 27676967. The next prime is 27677011. The reversal of 27676981 is 18967672.

27676981 = T₄₂₉₄ + T₄₂₉₅ + T₄₂₉₆.

It is a happy number.

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 27676981 - 2⁵ = 27676949 is a prime.

It is a super-2 number, since 2×27676981² = 1532030554548722, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27676921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8461 + ... + 11266.

It is an arithmetic number, because the mean of its divisors is an integer number (3669408).

Almost surely, 2^27676981 is an apocalyptic number.

27676981 is the 4296-th centered triangular number.

It is an amenable number.

27676981 is a deficient number, since it is larger than the sum of its proper divisors (1678283).

27676981 is a wasteful number, since it uses less digits than its factorization.

27676981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19811.

The product of its digits is 254016, while the sum is 46.

The square root of 27676981 is about 5260.8916544631. The cubic root of 27676981 is about 302.4866683558.

The spelling of 27676981 in words is "twenty-seven million, six hundred seventy-six thousand, nine hundred eighty-one".