27999760 has 40 divisors (see below), whose sum is σ = 65727936. Its totient is φ = 11091840.

The previous prime is 27999709. The next prime is 27999767. The reversal of 27999760 is 6799972.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (27999767) 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, 6925 + ... + 10195.

Almost surely, 2^27999760 is an apocalyptic number.

27999760 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 27999760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32863968).

27999760 is an abundant number, since it is smaller than the sum of its proper divisors (37728176).

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

27999760 is a wasteful number, since it uses less digits than its factorization.

27999760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3391 (or 3385 counting only the distinct ones).

The product of its (nonzero) digits is 428652, while the sum is 49.

The square root of 27999760 is about 5291.4799442122. The cubic root of 27999760 is about 303.6580295882.

The spelling of 27999760 in words is "twenty-seven million, nine hundred ninety-nine thousand, seven hundred sixty".