27680720 has 40 divisors (see below), whose sum is σ = 67748640. Its totient is φ = 10488960.

The previous prime is 27680717. The next prime is 27680747. The reversal of 27680720 is 2708672.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7586 + ... + 10625.

It is an arithmetic number, because the mean of its divisors is an integer number (1693716).

Almost surely, 2^27680720 is an apocalyptic number.

27680720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27680720 is an abundant number, since it is smaller than the sum of its proper divisors (40067920).

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

27680720 is a wasteful number, since it uses less digits than its factorization.

27680720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18243 (or 18237 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 27680720 is about 5261.2470004743. The cubic root of 27680720 is about 302.5002891421.

The spelling of 27680720 in words is "twenty-seven million, six hundred eighty thousand, seven hundred twenty".