327720 has 32 divisors (see below), whose sum is σ = 983520. Its totient is φ = 87360.

The previous prime is 327707. The next prime is 327721. The reversal of 327720 is 27723.

327720 = T₂₅₁ + T₂₅₂ + ... + T₂₆₀.

It is not an unprimeable number, because it can be changed into a prime (327721) by changing a digit.

327720 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1246 + ... + 1485.

It is an arithmetic number, because the mean of its divisors is an integer number (30735).

327720 is a Friedman number, since it can be written as 20*((7-3)^7+2), using all its digits and the basic arithmetic operations.

2³²⁷⁷²⁰ is an apocalyptic number.

327720 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

327720 is an abundant number, since it is smaller than the sum of its proper divisors (655800).

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

327720 is a wasteful number, since it uses less digits than its factorization.

327720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2745 (or 2741 counting only the distinct ones).

The product of its (nonzero) digits is 588, while the sum is 21.

The square root of 327720 is about 572.4683397359. The cubic root of 327720 is about 68.9447152204.

The spelling of 327720 in words is "three hundred twenty-seven thousand, seven hundred twenty", and thus it is an iban number.