722560 has 32 divisors (see below), whose sum is σ = 1728900. Its totient is φ = 288768.

The previous prime is 722539. The next prime is 722563. The reversal of 722560 is 65227.

It can be written as a sum of positive squares in 2 ways, for example, as 652864 + 69696 = 808^2 + 264^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (722563) by changing a digit.

722560 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 3 ways as a sum of consecutive naturals, for example, 76 + ... + 1204.

2⁷²²⁵⁶⁰ 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 722560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (864450).

722560 is an abundant number, since it is smaller than the sum of its proper divisors (1006340).

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

722560 is a wasteful number, since it uses less digits than its factorization.

722560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1148 (or 1136 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 722560 is about 850.0352933849. The cubic root of 722560 is about 89.7341951722.

Adding to 722560 its reverse (65227), we get a palindrome (787787).

The spelling of 722560 in words is "seven hundred twenty-two thousand, five hundred sixty".