722916 has 36 divisors (see below), whose sum is σ = 1873872. Its totient is φ = 234864.

The previous prime is 722903. The next prime is 722921. The reversal of 722916 is 619227.

722916 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 722916.

It is an unprimeable number.

722916 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 11 ways as a sum of consecutive naturals, for example, 1315 + ... + 1781.

It is an arithmetic number, because the mean of its divisors is an integer number (52052).

2⁷²²⁹¹⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 722916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (936936).

722916 is an abundant number, since it is smaller than the sum of its proper divisors (1150956).

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

722916 is a wasteful number, since it uses less digits than its factorization.

722916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520 (or 515 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 722916 is about 850.2446706684. The cubic root of 722916 is about 89.7489298786.

The spelling of 722916 in words is "seven hundred twenty-two thousand, nine hundred sixteen".