27790 has 16 divisors (see below), whose sum is σ = 57312. Its totient is φ = 9504.

The previous prime is 27779. The next prime is 27791. The reversal of 27790 is 9772.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27791) 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, 129 + ... + 268.

It is an arithmetic number, because the mean of its divisors is an integer number (3582).

2²⁷⁷⁹⁰ is an apocalyptic number.

27790 is an abundant number, since it is smaller than the sum of its proper divisors (29522).

It is a weird number, because it is abundant, but not a pseudoperfect number.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28656).

27790 is a wasteful number, since it uses less digits than its factorization.

27790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411.

The product of its (nonzero) digits is 882, while the sum is 25.

The square root of 27790 is about 166.7033293009. The cubic root of 27790 is about 30.2897844129.

The spelling of 27790 in words is "twenty-seven thousand, seven hundred ninety".