723822 has 24 divisors (see below), whose sum is σ = 1592808. Its totient is φ = 219120.

The previous prime is 723803. The next prime is 723823. The reversal of 723822 is 228327.

723822 = T₆₈ + T₆₉ + ... + T₁₆₆.

It is a junction number, because it is equal to n+sod(n) for n = 723792 and 723801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (723823) by changing a digit.

723822 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 (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 228 + ... + 1224.

It is an arithmetic number, because the mean of its divisors is an integer number (66367).

2⁷²³⁸²² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 723822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (796404).

723822 is an abundant number, since it is smaller than the sum of its proper divisors (868986).

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

723822 is a wasteful number, since it uses less digits than its factorization.

723822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024 (or 1013 counting only the distinct ones).

The product of its digits is 1344, while the sum is 24.

The square root of 723822 is about 850.7772916575. Note that the first 3 decimals coincide. The cubic root of 723822 is about 89.7864070708.

It can be divided in two parts, 7238 and 22, that added together give a triangular number (7260 = T₁₂₀).

The spelling of 723822 in words is "seven hundred twenty-three thousand, eight hundred twenty-two".