722406 has 8 divisors (see below), whose sum is σ = 1444824. Its totient is φ = 240800.

The previous prime is 722389. The next prime is 722411. The reversal of 722406 is 604227.

It is a happy number.

722406 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

722406 is an admirable number.

It is a congruent number.

It is an unprimeable number.

722406 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, 60195 + ... + 60206.

It is an arithmetic number, because the mean of its divisors is an integer number (180603).

2⁷²²⁴⁰⁶ is an apocalyptic number.

722406 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

722406 is a wasteful number, since it uses less digits than its factorization.

722406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120406.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 722406 is about 849.9447040837. The cubic root of 722406 is about 89.7278196703.

It can be divided in two parts, 722 and 406, that added together give a triangular number (1128 = T₄₇).

The spelling of 722406 in words is "seven hundred twenty-two thousand, four hundred six".