27380991 has 8 divisors (see below), whose sum is σ = 39826944. Its totient is φ = 16594520.

The previous prime is 27380987. The next prime is 27380993. The reversal of 27380991 is 19908372.

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 27380991 - 2² = 27380987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27380993) 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, 414831 + ... + 414896.

It is an arithmetic number, because the mean of its divisors is an integer number (4978368).

Almost surely, 2^27380991 is an apocalyptic number.

27380991 is a deficient number, since it is larger than the sum of its proper divisors (12445953).

27380991 is a wasteful number, since it uses less digits than its factorization.

27380991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829741.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 27380991 is about 5232.6848748993. The cubic root of 27380991 is about 301.4044921890.

The spelling of 27380991 in words is "twenty-seven million, three hundred eighty thousand, nine hundred ninety-one".