27827840 has 32 divisors (see below), whose sum is σ = 66527460. Its totient is φ = 11130880.

The previous prime is 27827797. The next prime is 27827857. The reversal of 27827840 is 4872872.

It can be written as a sum of positive squares in 2 ways, for example, as 27793984 + 33856 = 5272^2 + 184^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 27827794 and 27827803.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21101 + ... + 22380.

Almost surely, 2^27827840 is an apocalyptic number.

27827840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27827840 is an abundant number, since it is smaller than the sum of its proper divisors (38699620).

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

27827840 is an equidigital number, since it uses as much as digits as its factorization.

27827840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43500 (or 43488 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 38.

The square root of 27827840 is about 5275.2099484286. The cubic root of 27827840 is about 303.0352611391.

The spelling of 27827840 in words is "twenty-seven million, eight hundred twenty-seven thousand, eight hundred forty".