27804840 has 128 divisors (see below), whose sum is σ = 96768000. Its totient is φ = 6259968.

The previous prime is 27804817. The next prime is 27804841. The reversal of 27804840 is 4840872.

It is not an unprimeable number, because it can be changed into a prime (27804841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66151 + ... + 66569.

It is an arithmetic number, because the mean of its divisors is an integer number (756000).

Almost surely, 2^27804840 is an apocalyptic number.

27804840 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 27804840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48384000).

27804840 is an abundant number, since it is smaller than the sum of its proper divisors (68963160).

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

27804840 is a wasteful number, since it uses less digits than its factorization.

27804840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519 (or 515 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 33.

The square root of 27804840 is about 5273.0294897715. The cubic root of 27804840 is about 302.9517508595.

The spelling of 27804840 in words is "twenty-seven million, eight hundred four thousand, eight hundred forty".