722220 has 24 divisors (see below), whose sum is σ = 2022384. Its totient is φ = 192576.

The previous prime is 722213. The next prime is 722237. The reversal of 722220 is 22227.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 722220.

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, 5959 + ... + 6078.

It is an arithmetic number, because the mean of its divisors is an integer number (84266).

2⁷²²²²⁰ is an apocalyptic number.

It is an amenable number.

722220 is an abundant number, since it is smaller than the sum of its proper divisors (1300164).

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

722220 is a wasteful number, since it uses less digits than its factorization.

722220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12049 (or 12047 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 15.

The square root of 722220 is about 849.8352781569. The cubic root of 722220 is about 89.7201181806.

Adding to 722220 its reverse (22227), we get a palindrome (744447).

The spelling of 722220 in words is "seven hundred twenty-two thousand, two hundred twenty", and thus it is an iban number.