722648 has 16 divisors (see below), whose sum is σ = 1369680. Its totient is φ = 357408.

The previous prime is 722639. The next prime is 722663. The reversal of 722648 is 846227.

It is a self number, because there is not a number n which added to its sum of digits gives 722648.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 722648.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 386 + ... + 1262.

It is an arithmetic number, because the mean of its divisors is an integer number (85605).

2⁷²²⁶⁴⁸ is an apocalyptic number.

It is an amenable number.

722648 is a deficient number, since it is larger than the sum of its proper divisors (647032).

722648 is a wasteful number, since it uses less digits than its factorization.

722648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986 (or 982 counting only the distinct ones).

The product of its digits is 5376, while the sum is 29.

The square root of 722648 is about 850.0870543656. The cubic root of 722648 is about 89.7378379094.

It can be divided in two parts, 722 and 648, that multiplied together give a square (467856 = 684²).

The spelling of 722648 in words is "seven hundred twenty-two thousand, six hundred forty-eight".