27945688 has 16 divisors (see below), whose sum is σ = 55480680. Its totient is φ = 13150848.

The previous prime is 27945661. The next prime is 27945689. The reversal of 27945688 is 88654972.

It is a super-2 number, since 2×27945688² = 1561922955586688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27945689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102606 + ... + 102877.

Almost surely, 2^27945688 is an apocalyptic number.

It is an amenable number.

27945688 is a deficient number, since it is larger than the sum of its proper divisors (27534992).

27945688 is a wasteful number, since it uses less digits than its factorization.

27945688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205506 (or 205502 counting only the distinct ones).

The product of its digits is 967680, while the sum is 49.

The square root of 27945688 is about 5286.3681294439. The cubic root of 27945688 is about 303.4624329376.

The spelling of 27945688 in words is "twenty-seven million, nine hundred forty-five thousand, six hundred eighty-eight".