27681357 has 16 divisors (see below), whose sum is σ = 41564160. Its totient is φ = 16234800.

The previous prime is 27681349. The next prime is 27681361. The reversal of 27681357 is 75318672.

It is not a de Polignac number, because 27681357 - 2³ = 27681349 is a prime.

It is a super-2 number, since 2×27681357² = 1532515050722898, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27681337) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12507 + ... + 14552.

It is an arithmetic number, because the mean of its divisors is an integer number (2597760).

Almost surely, 2^27681357 is an apocalyptic number.

It is an amenable number.

27681357 is a deficient number, since it is larger than the sum of its proper divisors (13882803).

27681357 is a wasteful number, since it uses less digits than its factorization.

27681357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27104.

The product of its digits is 70560, while the sum is 39.

The square root of 27681357 is about 5261.3075371052. The cubic root of 27681357 is about 302.5026095442.

The spelling of 27681357 in words is "twenty-seven million, six hundred eighty-one thousand, three hundred fifty-seven".