27388540 has 12 divisors (see below), whose sum is σ = 57515976. Its totient is φ = 10955408.

The previous prime is 27388523. The next prime is 27388577. The reversal of 27388540 is 4588372.

It is a self number, because there is not a number n which added to its sum of digits gives 27388540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 684694 + ... + 684733.

It is an arithmetic number, because the mean of its divisors is an integer number (4792998).

Almost surely, 2^27388540 is an apocalyptic number.

27388540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27388540 is an abundant number, since it is smaller than the sum of its proper divisors (30127436).

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

27388540 is a wasteful number, since it uses less digits than its factorization.

27388540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1369436 (or 1369434 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 27388540 is about 5233.4061566058. The cubic root of 27388540 is about 301.4321889396.

The spelling of 27388540 in words is "twenty-seven million, three hundred eighty-eight thousand, five hundred forty".