27550440 has 96 divisors (see below), whose sum is σ = 90529920. Its totient is φ = 7265664.

The previous prime is 27550379. The next prime is 27550447. The reversal of 27550440 is 4405572.

It is not an unprimeable number, because it can be changed into a prime (27550447) 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 23 ways as a sum of consecutive naturals, for example, 36709 + ... + 37451.

It is an arithmetic number, because the mean of its divisors is an integer number (943020).

Almost surely, 2^27550440 is an apocalyptic number.

27550440 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 27550440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45264960).

27550440 is an abundant number, since it is smaller than the sum of its proper divisors (62979480).

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

27550440 is a wasteful number, since it uses less digits than its factorization.

27550440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863 (or 856 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 27550440 is about 5248.8513029043. The cubic root of 27550440 is about 302.0249676008.

The spelling of 27550440 in words is "twenty-seven million, five hundred fifty thousand, four hundred forty".