722680 has 64 divisors (see below), whose sum is σ = 1944000. Its totient is φ = 236544.

The previous prime is 722669. The next prime is 722713. The reversal of 722680 is 86227.

722680 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

722680 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 15 ways as a sum of consecutive naturals, for example, 8076 + ... + 8164.

It is an arithmetic number, because the mean of its divisors is an integer number (30375).

2⁷²²⁶⁸⁰ is an apocalyptic number.

722680 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 722680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (972000).

722680 is an abundant number, since it is smaller than the sum of its proper divisors (1221320).

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

722680 is a wasteful number, since it uses less digits than its factorization.

722680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136 (or 132 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 722680 is about 850.1058757590. The cubic root of 722680 is about 89.7391624678.

The spelling of 722680 in words is "seven hundred twenty-two thousand, six hundred eighty".