722248 has 8 divisors (see below), whose sum is σ = 1354230. Its totient is φ = 361120.

The previous prime is 722243. The next prime is 722257. The reversal of 722248 is 842227.

It can be written as a sum of positive squares in only one way, i.e., 605284 + 116964 = 778^2 + 342^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (722243) by changing a digit.

722248 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45133 + ... + 45148.

2⁷²²²⁴⁸ is an apocalyptic number.

It is an amenable number.

722248 is a deficient number, since it is larger than the sum of its proper divisors (631982).

722248 is a wasteful number, since it uses less digits than its factorization.

722248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90287 (or 90283 counting only the distinct ones).

The product of its digits is 1792, while the sum is 25.

The square root of 722248 is about 849.8517517779. The cubic root of 722248 is about 89.7212776292.

The spelling of 722248 in words is "seven hundred twenty-two thousand, two hundred forty-eight".