27387840 has 112 divisors (see below), whose sum is σ = 88952832. Its totient is φ = 7136256.

The previous prime is 27387823. The next prime is 27387863. The reversal of 27387840 is 4878372.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44817 + ... + 45423.

Almost surely, 2^27387840 is an apocalyptic number.

27387840 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 27387840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44476416).

27387840 is an abundant number, since it is smaller than the sum of its proper divisors (61564992).

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

27387840 is a wasteful number, since it uses less digits than its factorization.

27387840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674 (or 664 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 39.

The square root of 27387840 is about 5233.3392781283. The cubic root of 27387840 is about 301.4296209029.

The spelling of 27387840 in words is "twenty-seven million, three hundred eighty-seven thousand, eight hundred forty".