727220 has 24 divisors (see below), whose sum is σ = 1645224. Its totient is φ = 268416.

The previous prime is 727211. The next prime is 727241. The reversal of 727220 is 22727.

It can be written as a sum of positive squares in 4 ways, for example, as 44944 + 682276 = 212^2 + 826^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 727192 and 727201.

It is a congruent number.

It is an unprimeable number.

727220 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, 1139 + ... + 1658.

It is an arithmetic number, because the mean of its divisors is an integer number (68551).

2⁷²⁷²²⁰ is an apocalyptic number.

It is an amenable number.

727220 is an abundant number, since it is smaller than the sum of its proper divisors (918004).

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

727220 is a wasteful number, since it uses less digits than its factorization.

727220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2819 (or 2817 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 20.

The square root of 727220 is about 852.7719507582. The cubic root of 727220 is about 89.9266892712.

Adding to 727220 its reverse (22727), we get a palindrome (749947).

The spelling of 727220 in words is "seven hundred twenty-seven thousand, two hundred twenty", and thus it is an iban number.