27826 has 4 divisors (see below), whose sum is σ = 41742. Its totient is φ = 13912.

The previous prime is 27823. The next prime is 27827. The reversal of 27826 is 62872.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 22201 + 5625 = 149^2 + 75^2 .

It is a nialpdrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 27826.

It is not an unprimeable number, because it can be changed into a prime (27823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6955 + ... + 6958.

2²⁷⁸²⁶ is an apocalyptic number.

27826 is the 106-th centered pentagonal number.

27826 is a deficient number, since it is larger than the sum of its proper divisors (13916).

27826 is a wasteful number, since it uses less digits than its factorization.

27826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13915.

The product of its digits is 1344, while the sum is 25.

The square root of 27826 is about 166.8112706024. The cubic root of 27826 is about 30.3028582010.

The spelling of 27826 in words is "twenty-seven thousand, eight hundred twenty-six".