27838881 has 12 divisors (see below), whose sum is σ = 45956352. Its totient is φ = 15907896.

The previous prime is 27838873. The next prime is 27838883. The reversal of 27838881 is 18883872.

It is a happy number.

It is not a de Polignac number, because 27838881 - 2³ = 27838873 is a prime.

It is a super-2 number, since 2×27838881² = 1550006590664322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (27838883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 220881 + ... + 221006.

It is an arithmetic number, because the mean of its divisors is an integer number (3829696).

Almost surely, 2^27838881 is an apocalyptic number.

27838881 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

27838881 is a deficient number, since it is larger than the sum of its proper divisors (18117471).

27838881 is a wasteful number, since it uses less digits than its factorization.

27838881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441900 (or 441897 counting only the distinct ones).

The product of its digits is 172032, while the sum is 45.

The square root of 27838881 is about 5276.2563432798. The cubic root of 27838881 is about 303.0753333584.

It can be divided in two parts, 2783 and 8881, that added together give a square (11664 = 108²).

The spelling of 27838881 in words is "twenty-seven million, eight hundred thirty-eight thousand, eight hundred eighty-one".