27678768 has 40 divisors (see below), whose sum is σ = 77005488. Its totient is φ = 8516352.

The previous prime is 27678767. The next prime is 27678779. The reversal of 27678768 is 86787672.

It is a super-2 number, since 2×27678768² = 1532228395995648, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 27678768.

It is not an unprimeable number, because it can be changed into a prime (27678767) 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, 21555 + ... + 22802.

Almost surely, 2^27678768 is an apocalyptic number.

It is an amenable number.

27678768 is an abundant number, since it is smaller than the sum of its proper divisors (49326720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27678768 is a wasteful number, since it uses less digits than its factorization.

27678768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44381 (or 44375 counting only the distinct ones).

The product of its digits is 1580544, while the sum is 51.

The square root of 27678768 is about 5261.0614898516. The cubic root of 27678768 is about 302.4931783631.

The spelling of 27678768 in words is "twenty-seven million, six hundred seventy-eight thousand, seven hundred sixty-eight".