27986240 has 56 divisors (see below), whose sum is σ = 70164960. Its totient is φ = 10603008.

The previous prime is 27986219. The next prime is 27986261. The reversal of 27986240 is 4268972.

It is an interprime number because it is at equal distance from previous prime (27986219) and next prime (27986261).

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 27986194 and 27986203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3779 + ... + 8381.

Almost surely, 2^27986240 is an apocalyptic number.

27986240 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 27986240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35082480).

27986240 is an abundant number, since it is smaller than the sum of its proper divisors (42178720).

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

27986240 is a wasteful number, since it uses less digits than its factorization.

27986240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4639 (or 4629 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 27986240 is about 5290.2022645642. The cubic root of 27986240 is about 303.6091468177.

The spelling of 27986240 in words is "twenty-seven million, nine hundred eighty-six thousand, two hundred forty".