27691401 has 8 divisors (see below), whose sum is σ = 38113024. Its totient is φ = 17865360.

The previous prime is 27691397. The next prime is 27691403. The reversal of 27691401 is 10419672.

It is a happy number.

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

It is not a de Polignac number, because 27691401 - 2² = 27691397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27691403) 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, 148786 + ... + 148971.

It is an arithmetic number, because the mean of its divisors is an integer number (4764128).

Almost surely, 2^27691401 is an apocalyptic number.

It is an amenable number.

27691401 is a deficient number, since it is larger than the sum of its proper divisors (10421623).

27691401 is a wasteful number, since it uses less digits than its factorization.

27691401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297791.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 27691401 is about 5262.2619661131. The cubic root of 27691401 is about 302.5391921535.

The spelling of 27691401 in words is "twenty-seven million, six hundred ninety-one thousand, four hundred one".