27318640 has 40 divisors (see below), whose sum is σ = 63777168. Its totient is φ = 10882560.

The previous prime is 27318623. The next prime is 27318649. The reversal of 27318640 is 4681372.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27318649) 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 7 ways as a sum of consecutive naturals, for example, 24495 + ... + 25585.

Almost surely, 2^27318640 is an apocalyptic number.

27318640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27318640 is an abundant number, since it is smaller than the sum of its proper divisors (36458528).

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

27318640 is a wasteful number, since it uses less digits than its factorization.

27318640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1417 (or 1411 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 27318640 is about 5226.7236391453. The cubic root of 27318640 is about 301.1755358499.

The spelling of 27318640 in words is "twenty-seven million, three hundred eighteen thousand, six hundred forty".