27678380 has 48 divisors (see below), whose sum is σ = 62125056. Its totient is φ = 10321920.

The previous prime is 27678379. The next prime is 27678419. The reversal of 27678380 is 8387672.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 42860 + ... + 43500.

It is an arithmetic number, because the mean of its divisors is an integer number (1294272).

Almost surely, 2^27678380 is an apocalyptic number.

27678380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27678380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31062528).

27678380 is an abundant number, since it is smaller than the sum of its proper divisors (34446676).

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

27678380 is a wasteful number, since it uses less digits than its factorization.

27678380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794 (or 792 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 27678380 is about 5261.0246150346. The cubic root of 27678380 is about 302.4917649103.

The spelling of 27678380 in words is "twenty-seven million, six hundred seventy-eight thousand, three hundred eighty".