722446 has 4 divisors (see below), whose sum is σ = 1083672. Its totient is φ = 361222.

The previous prime is 722431. The next prime is 722459. The reversal of 722446 is 644227.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 722446.

It is a congruent number.

It is an unprimeable number.

722446 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 as a sum of consecutive naturals, namely, 180610 + ... + 180613.

It is an arithmetic number, because the mean of its divisors is an integer number (270918).

2⁷²²⁴⁴⁶ is an apocalyptic number.

722446 is a deficient number, since it is larger than the sum of its proper divisors (361226).

722446 is a wasteful number, since it uses less digits than its factorization.

722446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361225.

The product of its digits is 2688, while the sum is 25.

The square root of 722446 is about 849.9682347006. The cubic root of 722446 is about 89.7294757319.

The spelling of 722446 in words is "seven hundred twenty-two thousand, four hundred forty-six".