27690720 has 48 divisors (see below), whose sum is σ = 87227280. Its totient is φ = 7384064.

The previous prime is 27690713. The next prime is 27690721. The reversal of 27690720 is 2709672.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27690721) 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, 28365 + ... + 29324.

It is an arithmetic number, because the mean of its divisors is an integer number (1817235).

Almost surely, 2^27690720 is an apocalyptic number.

27690720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27690720 is an abundant number, since it is smaller than the sum of its proper divisors (59536560).

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

27690720 is a wasteful number, since it uses less digits than its factorization.

27690720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57707 (or 57699 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 27690720 is about 5262.1972597006. The cubic root of 27690720 is about 302.5367120710.

The spelling of 27690720 in words is "twenty-seven million, six hundred ninety thousand, seven hundred twenty".