722478 has 8 divisors (see below), whose sum is σ = 1444968. Its totient is φ = 240824.

The previous prime is 722467. The next prime is 722479. The reversal of 722478 is 874227.

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

722478 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722479) by changing a digit.

722478 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, 60201 + ... + 60212.

It is an arithmetic number, because the mean of its divisors is an integer number (180621).

2⁷²²⁴⁷⁸ is an apocalyptic number.

722478 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.

722478 is a wasteful number, since it uses less digits than its factorization.

722478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120418.

The product of its digits is 6272, while the sum is 30.

The square root of 722478 is about 849.9870587250. The cubic root of 722478 is about 89.7308005372.

The spelling of 722478 in words is "seven hundred twenty-two thousand, four hundred seventy-eight".